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How to repair the common faults of the video card?
Common fault one: no display at boot
This type of failure is usually caused by poor contact between the graphics card and the motherboard or a problem with the motherboard slot. For motherboards with integrated graphics cards, if the memory shared the main memory, you should pay attention to the location of the memory module. Generally, the memory module should be inserted in the first memory module slot. There is no display failure due to the reason of the graphics card. Generally, a long and two short beeps will be issued after booting (for AWARD BIOS graphics cards).
Common fault 2: display flower screen, can't see the handwriting
Such failures are generally caused by the fact that the display or graphics card does not support high resolution. When the screen is displayed, you can switch the startup mode to the safe mode, and then enter the display settings under Windows 98. In the 16-color state, click the “Apply” and “OK” buttons. Restart, delete the graphics card driver in the normal mode of Windows 98 system, restart the computer. You can also enter the safe mode. In the pure DOS environment, edit the SYSTEM.INI file, change display.drv=pnpdrver to display.drv=vga.drv, save the disk, and update the driver in Windows.
Common fault 3: The color display is abnormal. The faults generally have the following reasons:
1. The display card is not in good contact with the monitor signal cable.2. The display itself is faulty.3. In some software, the color is not normal when running. It is common in old-fashioned machines. There is an option to check the color in the BIOS, and it can be turned on.4. The graphics card is damaged.5. The display is magnetized. This type of phenomenon is generally caused by excessive proximity to objects with magnetic properties. After magnetization, the display may be deflected.
Common fault four: crash
Such failures are generally seen in the incompatibility between the motherboard and the graphics card or poor contact between the motherboard and the graphics card. Incompatibility between the graphics card and other expansion cards can also cause a crash.
Common fault five: abnormal noise or pattern on the screen
Such failures are generally caused by problems with the graphics card's memory or poor contact between the graphics card and the motherboard. You need to clean the gold finger of the graphics card or replace the graphics card.
Common fault six: graphics card driver is missing
The graphics card driver is loaded. After running for a period of time, the driver is automatically lost. This type of fault is generally caused by poor quality of the graphics card or the graphics card is not compatible with the motherboard, which makes the graphics card temperature too high, resulting in unstable system operation or crash. Only replace the graphics card.In addition, there is a special case where the graphics card driver was previously loaded, but after the graphics card driver is loaded, it crashes when entering Windows. Other models of graphics cards can be replaced. After loading their drivers, insert the old graphics card to solve. If this type of failure cannot be resolved, the registry is faulty, and the registry can be restored or the operating system can be reinstalled.
Common faults on computer motherboards?
The motherboard is a key component of the entire computer and plays a vital role in the computer. If the motherboard fails, it will affect the work of the entire PC system. Let's take a look at the most common faults in the motherboard during use.
Common fault one: no display at boot
There is no display when the computer is turned on. The first thing to check is the BIOS. The motherboard's BIOS stores important hardware data. At the same time, the BIOS is also a relatively vulnerable part of the motherboard. It is extremely vulnerable to damage. Once it is damaged, the system will not run. This type of failure is usually caused by the destruction of the motherboard BIOS by the CIH virus. (Of course, it does not rule out that the motherboard itself is faulty and the system cannot run.). Generally, the data in the hard disk will be completely lost after the BIOS is destroyed by the virus. Therefore, it can be judged whether the BIOS is damaged by detecting whether the data of the hard disk is intact. If the data of the hard disk is intact, there are three reasons for the booting without display:
1. Because there is a problem with the motherboard expansion slot or expansion card, the motherboard does not respond and does not display after plugging in an expansion card such as a sound card.2. The jumper-free motherboard has a wrong CPU frequency set in CMOS, which may also cause no display failure. For this, just clear the CMOS to solve it. Clear the CMOS jumper is generally near the lithium battery of the motherboard, its default position is generally 1, 2 short circuit, as long as it is changed to 2, 3 short circuit for a few seconds to solve the problem, for the old motherboard if the user can not find To the jumper, just remove the battery, wait until the boot display enters the CMOS settings, then turn it off, and the battery will also go up to the CMOS discharge.3. If the motherboard does not recognize the memory, the memory is damaged, or the memory does not match, it will cause the display to fail without booting. Some old motherboards are more picky memory. Once plugged in memory that the motherboard does not recognize, the motherboard will not boot, and even some motherboards will not give you any fault prompts (tweets). Of course, sometimes in order to expand the memory to improve system performance, the result is that plugging in different brands and types of memory will also lead to such failures, so you should pay more attention when overhauling.For the failure of the motherboard BIOS to be destroyed, you can plug in the ISA graphics card to see if there is any display (if prompted, you can follow the prompt steps.) If there is no boot screen, you can make a floppy disk that automatically updates the BIOS. Flash BIOS, but some motherboard BIOS is destroyed, the floppy drive does not work at all, at this time, you can try to solve it with hot plug method (I have tried, as long as the BIOS is the same, can be successfully burned in the same level of the motherboard) record.). However, the use of hot-swap in addition to the need for the same BIOS may also cause damage to some components of the motherboard, so a reliable method is to use the code writer to write the BIOS update file to the BIOS (you can find a computer with this service to solve the problem).
Common fault 2: CMOS settings cannot be saved
This type of fault is generally caused by insufficient battery voltage on the motherboard. This can be replaced, but some motherboards can not solve the problem after replacing the battery. There are two possibilities:1. Motherboard circuit problem, find professional repair for this.2. The motherboard CMOS jumper problem, sometimes because the wrong CMOS jumper on the motherboard is set to clear option, or set to an external battery, so that CMOS data can not be saved.
Common fault 3: After the motherboard driver is installed under Windows, the crash occurs or the speed of the optical drive is slow.
This phenomenon sometimes occurs on some brand-name motherboards. After the motherboard driver is installed, restarting the computer does not allow you to enter the Windows 98 desktop in normal mode, and the driver cannot be uninstalled under Windows 98. If this happens, it is recommended to find the latest driver reinstallation, the problem can generally be solved, if it is not, you can only reinstall the system.
Common fault four: the mouse is not available when installing Windows or starting Windows
Software causes for such failures are generally caused by incorrect CMOS settings. There is a modem use IRQ project in the power management bar of the CMOS settings. His options are 3, 4, 5, ..., NA. Generally, its default option is 3, which is set to an interrupt other than 3. Just fine.
Common fault five: the computer crashes frequently, and there will be a crash when performing CMOS settings.
There is a crash in CMOS, usually there is a problem with the motherboard or the CPU. If the fault cannot be solved by pressing the method, then only the motherboard or the CPU is replaced.This type of failure is usually caused by a problem with the motherboard Cache or poor heat dissipation of the motherboard design. On the 815EP motherboard, it was found that the fault caused by the heat dissipation of the motherboard is not good enough. After the crash, touch the motherboard components around the CPU and find that the temperature is very hot. After replacing the high power fan, the crash is resolved. For faults with Cache problems, you can enter the CMOS settings. After the Cache is disabled, the problem can be solved smoothly. Of course, the speed will definitely be affected after the Cache is disabled.
Common fault six: motherboard COM port or parallel port, IDE port failure
This kind of fault is usually caused by the user plugging and unplugging related hardware. At this time, the user can replace it with a multi-function card, but before the replacement, the COM port and the parallel port must be disabled on the motherboard (some motherboards have IDE ports). It is forbidden to use it normally).
How to choose NVIDIA's game graphics card?
Let's take a look at how the NVIDIA graphics card model is divided. NVIDIA graphics card model division, divided into K, P, RTX, GTX and GT, what is the difference between them?
First of all, K and P, it represents a professional-level graphics card. If you want to do 3D animation or do modeling, or do AE animation, you can use this kind of professional graphics card, other types are games. The graphics card of the class.
RTX series, which belongs to high-end graphics cards, players with enthusiast-level installations will choose this type of graphics card.
GTX series, which belongs to high-end graphics cards, such as online games such as playing Jedi, or a single game like Devil May Cry, will choose this type of graphics card. Some GTX series graphics card suffixes plus Ti, this is a enhanced graphics card. For example, GTX1050Ti is an enhanced version of GTX1050.
For the GT series, daily office, watching video, you can choose the GT series.
You can fix it yourself, the most common 5 major computer failures
For those who don't understand the computer, in the process of using the computer, we will inevitably encounter various computer failures. In the face of such a situation, the first idea that sprouted in my mind was to take it to the computer store for repair. In fact, some computer failures can be used normally by simply handling them. Why waste money? Then, after finishing the five major faults and solutions that are common to the computer, you can solve it yourself!
Fault 1: computer blue screen
1. Reason analysis: bad memory bar contactSolution: Open the chassis to fix the memory module and perform dust removal on the computer. This way, the computer can run better. If the computer still has a blue screen, it may be a problem with the memory module. Consider replacing the memory module.2. Cause analysis: Incompatible software installation leads to blue screenSolution: If a blue screen appears after installing a software, you must uninstall this software. If the blue screen still appears after uninstalling, there are other reasons.3, the cause analysis: computer poisoning caused by computer blue screenSolution: If it is caused by a virus, you need to restart the computer and perform anti-virus operation. If the computer is still blue screen, you can consider reinstalling the system.4, the cause analysis: computer overclocking caused the CPU to overheat or the internal hardware temperature is too highSolution: At this time, check whether the CPU fan and the graphics card fan are rotating normally. If it is normal, the main consideration is to strengthen the heat dissipation.
Fault 2: No response after inserting the USB flash drive
Cause analysis: The computer itself is set or the USB flash drive is damaged.Solution: Replace the interface. If the USB flash drive is still unresponsive, you can insert it into the USB interface of other computers. If it can be read normally on other computers, the problem lies in the computer settings. On the contrary, if it is on other computers. If it is still unreadable, there is a possibility that the U disk has a problem.If it is the reason for the computer settings, open the "Run" dialog box and enter the command "gpedit.msc" to open the "Group Policy" manager. Expand Computer Configuration→ Manage Modules→ System, and double-click the Disable AutoPlay item. In the window that opens, set it to the "disabled" state and click "OK" to complete the setup.
Fault three: the computer temperature is too high, causing Caton
Analysis of the cause: There are too many programs running in the background, which is beyond the scope of the CPU. It may also be caused by poor heat dissipation in the computer case.Solution: You can use some cleaning software to stop unnecessary programs in the background and clean up the system garbage. Regarding the heat dissipation of the chassis, we can do some simple maintenance, such as cleaning the dust inside the chassis, especially the CPU and the dust on the cooling fan.
Fault 4: The network cannot be used
1. Reason analysis: The NIC driver is not installed correctly.Solution: Re-download and install the NIC driver, such as the driver wizard, etc.2. Reason analysis: IP address conflictSolution: 1 Click the network connection icon in the lower right corner of the computer and click "Open Network and Sharing Center"2 In the new window that opens, click "Change Adapter Settings" in the top left corner.3Open "Network Connection", right click on "Local Area Connection" and select "Properties" button4 The Local Area Connection Properties dialog box is displayed. Double-click the "Internet Protocol Version 4 (TCP/IPv4)" option in the "This Connection Uses the Following Items" list.5 The “Internet Protocol Version 4 (TCP/IPv4)” dialog box is displayed, select the “Use the following IP address” option, and then assign an IP address to the machine in the “IP Address” text box.6 The “Internet Protocol Version 4 (TCP/IPv4)” dialog box is displayed, select the “Use the following IP address” option, and then assign an IP address to the machine in the “IP Address” text box.7 After filling in, position the mouse cursor in the “Subnet Mask” text box and the system will automatically fill the subnet mask.8 Enter the gateway address in the Default Gateway, which is the address of the router. Then click the "OK" button to save and you can set it successfully.
Fault 5: The computer cannot enter the system
Cause analysis: system crash or hard drive damageSolution: Try to reinstall the system. If the hard disk is not recognized, the hard disk is damaged and the hard disk is replaced.
DJS TECH Daily use and maintenance of touch screen POS machine
Touch screen POS daily use precautions1 Before starting the machine, you must check whether the power supply is tight. If it is loose, you must plug it in before you can turn it on.2 The following boot sequence must be followed: peripheral devices (printer, guest display, etc.), host.3 The cashier does not allow hard objects to hit the touch screen, the main unit, etc. when using the cash register.4 The cashier can only click on the touch screen with his finger, and it is forbidden to use the nail or other object (magnetic card) to click on the touch screen.5 It is not allowed to place liquids that are easy to tip over on the cash register and in the surrounding area.6 Do not use sharp points, strokes, or cut touch screens.7 Do not place any liquid on the touch screen.8 During use, you must shut down normally. Do not press the power switch or unplug the power plug without exiting the system.9 When the program is wrong or other factors cause the machine to not respond for a long time, press and hold the power switch for five seconds to turn the machine off. Do not pull the power switch directly.Touch screen POS daily maintenance considerations1 The cashier must keep the cash register clean and tidy, and can not place any other items on the cash register and around it to prevent the cash register from being affected.Cooling effect.2 The cashier must regularly check the connection of various power lines and data lines.3 The cashier must periodically clean the touch screen with glass. First, spray the glass cleaner on a soft cloth or towel, then scrub the touch screen.4 It is forbidden to spray the glass directly on the touch screen.5 The cashier must clean the foreign objects inside the cash box regularly.6 It is strictly forbidden to use liquid such as water during the process of cleaning the touch screen and cash drawer.7 When cleaning the machine, it is forbidden to use corrosive cleaning liquid.
How to choose the most cost-effective POS cash register?
First of all, you need to have a basic understanding of the knowledge of the cash register system, and then determine which grade of products to buy according to actual needs, after the effort to choose a POS cash register that is both practical and investment-saving.The cash register system includes hardware - cash register (POS) and software - a commercial automation management system (MIS). The cash register is divided into three types: first generation, second generation and third generation. The difference is that the functions are different and the prices vary greatly.A generation of cash register software firmware, only the payment function, does not have the ability to connect to the network; the second generation of cash register software firmware, can be connected to a variety of peripherals, can be single or networked; three generations of POS cash registers with open systems. It can be applied to a variety of platforms, software to achieve financial and production progress report analysis functions, can be connected to a variety of peripherals, can also use IC card, bank card authorization terminal, connect MODEM, can be stand-alone or networked. The third-generation POS cash register is the mainstream of POS development in the future.The third-generation POS cash register consists of the following components: main unit, keyboard, display, micro printer, cash drawer, customer display, barcode viewer, card slot, and so on. The first three items are related to one computer, and the last five items are peripheral devices; the computer is the heart of the POS cash register, which determines the quality stability of the POS cash register, and the peripheral devices are independent, and can be arbitrarily selected as ordinary or luxury type. The price varies greatly.The keyboard has two kinds of ordinary keyboards and programmable keyboards. For fast-food shops with less types of collections, road toll stations, etc., a programmable keyboard can be used, which can fix a key to indicate a certain kind of goods, and is convenient to operate.The printer has a pin-type, thermal two-micro printer, the print head of the dot-type printer has a certain life, good quality brand-name products, long life, it uses ordinary roll paper, the price is cheap, but the price of repair and replacement print head is higher . The thermal machine has the advantages of high speed, durability and no damage to the print head. Although the use of thermal paper is more expensive, the quality is better. Both printers have their own advantages.The customer display has LED, LCD, VFD liquid crystal display, several types of display digital, English and Chinese characters, single line and double line display. Among them, LED digital display is cheaper, and the common type and luxury type are divided into English and Chinese characters.From the sensitivity of the bar code reader, it is the CCD that can be viewed at a close distance. From 0-15CM, the laser gun can be viewed at any angle.The IC card and the magnetic card brush slot each cost $400. Some programmable keyboards or POS cash registers are attached to the chassis, which are relatively cheaper and do not occupy much space.When you understand the configuration of the POS cash register, you understand that the configuration of the POS cash register is different, and the price difference is also very large. So depending on the budget, you decide what kind of POS cash register to buy.Ready to make a choice? DJS TECH makes it easy for you to find the POS cash register you need.
Top ten common faults and solutions for Windows systems
The Windows operating system has been used for a long time and has encountered many types of problems. So, sum it up: In fact, you can easily solve most of the problems yourself.In this article, I will share with you the most common Windows issues based on some of my experiences and how easy it is to solve them.1. File Explorer does not display drive informationSometimes, one or more drives in the File Explorer may disappear without a trace. If you encounter this situation, you can right click on any blank space and select "Refresh".If this still doesn't solve the problem, you can try to hide them. Double-click the "Disk Drive" option at the top and your disk drive should appear there. You can also check if the problem can be fixed by restarting the computer.If this method still doesn't work for you, you can press the Windows + R key at the same time and type "compmgmt.msc" in the run dialog to open the "Computer Management" form. Click Disk Management on the left panel to open all hard drives.Right click on the disappearing disk and check "Change drive letter and path".Now click on "Change" and select a different drive letter on the next page. This way the disk drive can appear again in the File Explorer.2. The search area in the start menu is missing.Sometimes a program may disable the search area in the Windows Start menu and cause it to be inaccessible. If you encounter such a situation, you can easily restore it by following the steps below.Go to the Control Panel from the Start menu and click Uninstall a Program under the Programs option.On the left panel, you click on the link "Enable or disable Windows features". The "Windows Features" form will be opened, you can check the box next to "Windows Search" and click "OK" to save your changes.You will be prompted to restart your computer. After you have confirmed the prompt and restarted the computer, the search area should be restored.3. The file cannot be opened by the default programYou will feel very annoyed when you double-click on a file but cannot be opened by the program you need. Many programs change the default program for files when they are installed. Sometimes, the programs you need to open for a particular file type will also be modified. Fortunately, in Windows, changing the default program for any type of file is fairly easy.You can hover your mouse over the file, right click on it and select the "Open with" option. In the menu that pops up on the side, click "Choose Default Program".You can select and set the default program for this particular file type in the program list. Also make sure to check the option "Always use the selected program to open this file" so that the program you choose will always be used to open files of that type.4.Windows continues to enter sleep modeBy default, Windows is set to enter sleep mode after a specified period of idle time. This also happens when some processes are still working (but not the media player). If you are not satisfied with this setup, then you can easily adjust it in the power options.Press the Windows + R key at the same time and enter "powercfg.cpl" in the "Run" dialog to open the power options. Click "Change Plan Settings" here, then select "Never" from the drop-down menu next to "Make your computer go to sleep." This will prevent your computer from automatically going into sleep mode.5.Windows slides don't workSlideshow wallpapers and themes are a great way to keep your desktop fresh, but sometimes Windows may disable slides to save power. If your slideshow feature on Windows doesn't work, you can enable it by following these steps:As described above, re-enter the power supply selection and click "Change Advanced Power Settings". Click Expand in the Desktop Background Settings option in the pop-up form, and then expand Slide Show further. Select "Available" in its drop-down menu.6.Windows takes too much time to enter sleep modeThe sleep function usually takes 3 - 5 seconds to put the computer to sleep, but if it exceeds 15 seconds, then you must use the hybrid sleep feature. Hybrid sleep first copies all processes from memory to the hard disk and then sleeps the computer. This helps preserve the current session in response to a power outage, but it also significantly increases the computer's sleep time.If you are not satisfied with this feature, you can easily transfer to the regular sleep function.Same in the Advanced Settings in Power Options, expand the Sleep option, and then expand Allow Mixed Sleep. By selecting "Off" from its drop-down menu, Hybrid Sleep will be disabled.7.Windows continues to wake up automatically from sleep modeThere are two reasons why Windows may continue to wake up automatically from sleep mode. Either there is a connected device to wake it up, or the automatic software needs to wake up the computer to complete its task.For external devices, unplug the device one by one to find the culprit. In particular, a failed device will force the computer to wake up from sleep. I have had a faulty keyboard that has caused such things many times.In order to prevent the application from waking up to the PC, you can go to the "Advanced Settings" of "Power Options" again and expand the "Sleep" option. Then expand the "Allow Wakeup Timer" option, "Disable". This will prevent any program from waking up to the PC.8. Not reflected in time when changing folders and filesSometimes when you edit a file or folder, its changes are not immediately visible. For example, if you change the size of some images, the changes in size and size in their descriptions may not be updated immediately. This can also happen when you rename a file.If you do encounter such a problem, just right click on any part of the form and select "Refresh" from the pop-up menu. This option will reproduce everything after synchronizing the changes.If the refresh option doesn't work, you can solve this problem by temporarily leaving the current folder and then coming back.9. Disable the daemon in Windows 10Whether you use it or not, Windows has a lot of common applications running in the background. If you feel that your computer or Internet connection is slow, it may be helpful to stop the background application of Windows 10.Open the Start menu and click "Settings". In Settings, click Privacy and scroll down to Background Apps. Select "Close" all the Windows 10 apps you don't need here.This will only disable their background processes, you can still use these applications and all their features.10. Sleep mode in the Windows 10 power option has disappearedIf the hibernate option is not available in the Windows 10 power options, you can retrieve it by doing the following:Press the Windows + R key at the same time and enter "powercfg.cpl" in the "Run" dialog to open the power options. In the left panel, select the "Select function for power button" option. Click the "Change settings not currently available" option at the top. Scroll down and check the box next to Hibernate.
Six common problems with the industrial control host/mini PC
Can the industrial control host/mini PC be used as a normal computer?The industrial control host/mini PC itself is a computer, but its size is reduced. Due to the improvement of the production process, the performance is not worse than that of the general tablet. At the same time, since the power consumption is only about 30W, the power consumption is significantly reduced. #DJS-IPC6COM industrial control host/mini PC adopts all-aluminum body design, which utilizes its strong thermal conductivity to perfectly solve the heat dissipation problem of small chassis. It combines the exquisite mini fashion design for business office computer and industrial control industry. Say, it can fully meet the application needs.Which systems does the Industrial Control Host/Mini PC support?The industrial control host/mini PC supports Win7/WIN8.1/Win10/LINUX (including UBUNTU, CentOS, Debian) and other operating systems.Industrial control host / mini PC is good?I believe that this problem will be accompanied by the development of the mini computer industry for a long time. In fact, the answer is yes. It is the best replacement for PCs. It has the performance of general PCs, and it has low function and small size. The appearance is exquisite and so on, in the future, it will certainly be successful in the PC market.Is the all-in-one computer still an industrial control host/mini PC?The all-in-one computer and the industrial control host/mini PC have their own advantages. From the configuration, maintainability, scalability, and removability, the industrial control host/mini PC has a considerable advantage, and the price is not very different. In addition, due to the high integration of the #DJS TECH all-in-one machine, its heat dissipation solution is not ideal, but the all-in-one computer is not nothing, its integrated design and a more compact appearance is also a bright spot. As for the choice of one machine or industrial control host / mini PC, consumers need to consider the specific needs.What are the uses of the industrial control host/mini PC?1) Use as HTPC, put it in the living room and connect with TV (via VGA or HDMI) as a network movie player, go online, watch movies, or use it as a download video resource (optional large-capacity hard disk)2) Business office, less than 30W, compact, exquisite, quiet, save space;3) Hotel room special computer, beautiful and high-grade, very convenient to put in the hotel room, and at the same time have anti-theft lock to improve safety;4) Education and training industry, compared with traditional PC, has better cost performance, better software compatibility, faster speed;5) It can be used as the main accessory of remote media player, advertising machine, all-in-one machine, POS machine, etc., and it is developed into other products for secondary development.
What is Full HD?
ull HD refers to 1080p image resolution. Full HD is the standard resolution for most HD videos found in Blu-ray, digital TV and online, such as those on YouTube, Hulu and Vimeo. Full HD is lower than standard HD or 720p - lower than full 1080p HD image resolution. At the upper end of the spectrum, there is Ultra HD (UHD or 4K). This image resolution is larger, clearer and clearer than 1080p. However, Ultra HD image resolution is not yet widely adopted.In some cases, the term "HD" can be used interchangeably with "Full HD" to describe the image resolution of a product. This can easily lead to confusion, because HD can also refer to standard HD or 720p. For the sake of clarity, you should know that HD may refer to 720p or 1080p, but Full HD can only refer to 1080p. In addition, the phrase HD Ready refers only to 720p. If you are unsure of the monitor image resolution based on the product description, check the specifications to determine the actual image size. This will be discussed in more detail below.What is the difference between "HD Ready" and "Full HD" resolution?When used to describe a television or monitor, the term "HD Ready" refers to a 720p image resolution. The term "HD" can also be used. The 720p image resolution contains 720 rows of pixels along the vertical axis and 1,280 rows of pixels along the horizontal axis. Therefore, the image is 720 pixels high and 1,280 pixels wide. This results in a total number of pixels of 921,600. This is the lowest image resolution considering high definition. The difference between HD Ready (or HD), Full HD and Ultra HD is as follows:HD: 720p image resolution (1,280 x 720 pixels - total pixels are about 1 million)Full HD: 1080p image resolution (1,920 x 1,080 pixels - total pixels about 2 million)Ultra HD: 4K image resolution (3,840 x 2,160 pixels - total pixels about 8 million)The more pixels in the image, the better. why? Since there are more pixels, the image can be displayed in a larger size without deteriorating the image. More pixels in a given area also allow the image to contain little or no visible pixels - this is called a "retina display." In a retina display, there are more pixels in a particular area than pixels that the human eye can see alone.What is the difference between HD and Full HD in practice? For example, consider this: a 50-inch TV with 1080p image resolution will be sharper and finer than a 50-inch TV with 720p image resolution. In addition, the physical size of a 1080p retina display may be larger than a 720p retina display because there are more total pixels. For the best image quality, Full HD delivers superior images for standard HD.Buy DJS TECH today for HD and Full HD all-in-one PCs, desktops and monitors.
SSD vs HDD: Which machine is best for my computer?
Advantages of Solid State Drives (SSDs)Solid state drives or SSDs are an electronic storage option that eliminates moving parts that make traditional magnetic hard drives susceptible to damage and mechanical failure. It uses low-latency flash memory similar to cameras and smartphones, where data is stored in a contiguous portion of the SSD chip that can be used (or erased and reused) as needed.SSDs are considered to be superior to HDD in a variety of ways:SSD Advantage: Faster Data Access - SSDs can call data faster, thus speeding up startup time and application loading speed.SSD advantage: more durable - no moving parts, SSD is not susceptible to drops and drops.SSD Advantage: Lighter Weight - SSDs are lighter in weight than HDDs (ideal for laptops and other portable devices).SSD advantages: quieter, cooler - SSDs are less noisy and run cooler than HDDs that spin disks and robotic arms.SSD Advantage: Reduce Data Fragmentation - Data on SSDs is stored in a larger, more compact memory portion than HDDs.On the other hand, the cost of SSD is two to three times higher than HDD. It usually has less capacity and may have a shorter lifetime (SSDs are ideal for storing and retrieving large numbers of small data files frequently (for example, at startup), but doing the same for large files is more problematic because of the large required semiconductors Strips of material can only be used/erased many times). It is also acceptable that it is more difficult to rescue the data than to use the HDD when the SSD fails.Advantages of hard disk drive (HDD)Traditional hard disk drives or HDDs store data on one or more metal disks coated with magnetic material. The disk is mechanically rotated until a particular data segment (or available white space) is aligned with the magnetic recording head, and the magnetic recording head can read and write discrete data bits on the allocated segments, which can be non-continuous to maximize storage . Disk movement creates unique clicks associated with HDDs, which is why they are sometimes referred to as "rotating" disks or drives.This is why some users think that hard drives are better than SSDs:Hard Drive Advantages: Greater Capacity - It's easy to find multi-disk drives with 2 TB or larger, but the complex layout of SSD chip circuits has so far been much smaller (128 GB or 256 GB is common).Hard drive advantage: lower price - flash is still relatively expensive. On a per-GB basis, the cost of a hard drive will be half or one-third the size of an SSD of the same size.Hard Drive Advantages: Longer Lifetime - Hard drive technology is proven to be reliable unless it is physically damaged. And because it uses more physical processes than electronic processes, it is easier to get data from an HDD than from an SSD.In terms of drawbacks, HDDs will save and retrieve data more slowly than flash-based SSDs. It will also be heavier, generate more noise, generate more heat, and consume more battery power. So while hard drives are still a popular component in laptops, SSDs are gaining market share in this category.SSD and HDD: Is the HDD RPM rate important?If you are looking at a PC with a traditional HDD, be aware of the RPM or the number of revolutions per minute, which measures how quickly the media disk spins within the device. The two most common RPM rates in today's hard drives are 5,400 RPM and 7,200 RPM. [Some hard drives work faster, but they are usually not used on consumer computers. ]Is the 7,200 RPM hard drive running faster than the 5,400 RPM drive? Yes. Therefore, buying a 7,200 RPM hard drive is one way to improve the performance of your new PC without the extra cost of a solid state drive. [Another option is Intel's Optane memory acceleration technology. However, experts disagree about whether a faster RPM rate will lead to a proportional increase in data access speed. Some people say that the real difference is smaller, the 5,400 RPM drive runs at 100 MB / s, and the 7,200 RPM drive runs at 120 MB / s.Should I purchase dual storage systems (HDD and SSD)?PC manufacturers also produce computers that use both HDD and SSD technology. These dual storage systems are designed to take advantage of the best aspects of storage: SSDs for data that require fast repeat access, and HDDs for materials that are more suitable for long-term storage (and less frequent access).What are the advantages of dual storage HDD / SSD systems? By placing your operating system on an SSD, the initial boot time is much faster because the system can access critical boot files faster (almost immediately) than using HDDs. Depending on the size of the SSD, you can also put the most commonly used software programs and personal files on the SSD. At the same time, you can use larger HDDs to store larger files, such as photos, videos, and games, which are accessed infrequently.Ready to make a choice? DJS TECH makes it easy to find the SSD or HDD models you need.
1. Generally caused by system software, memory and hard disk.
2. If you can't enter the system, you can go to the system to select the last correct configuration (which can solve the error caused by wrong driver installation) and the security mode with network connection (there is a network after entering, and then use 360 software to get it down), which may be repaired.
3. click start menu to run and enter cmd enter, and enter at the command prompt.
For% 1in (%windir% \ system32 \ *. dll) do regsvr32.exe/s% 1 and press enter. Then let him run, should be possible to solve
4. Recently, the computer was poisoned, unstable software was installed, etc. It is suggested to completely kill virus, remove the software that caused the problem, and reinstall other versions, which may solve the problem. If not, it is ok to reinstall the system.