Does the LCD screen still have to be repaired?

Can the display be repaired if the screen is broken"If there is a screen that can actually be repaired, but generally after this situation occurs, we must have no way to repair it ourselves, and we must send it to a place dedicated to repairing the computer screen for maintenance, or directly to the brand's after-sales service department for maintenance. However, usually the maintenance cost in this case will be relatively high,So I personally think that instead of repairing this display,It's better to replace a new display screen directly,At least after replacing the new display,We can also get a period of warranty display decoding board problem,Go to the repair point for maintenance or if you have strong hands-on ability, go to a treasure to buy a dismantling board and replace it。 If the replacement board exceeds 200 yuan, forget it, because buying a second-hand monitor will not exceed 250 yuan.

The TV looks at the phenomenon of a blurred screen,How should we repair it?,Collected information,Let's take a look。

1. First, measure whether the clock output of the motherboard is normal.

2. Then check the motherboard signal R g B from the input to the main chip part of the line (whether there is false soldering, short circuit, capacitor resistance has any wrong value.

3. Finally, check whether there is false soldering and short circuit in part of the circuit of the connection seat output to the screen signal output to the screen (IC pins, row resistance and seat, double row pins, pay special attention to the flat socket, replace the screen or replace the general driver board if necessary.

4. If there is a white screen, it means that the backlight board can work normally, first judge whether the motherboard can work normally, you can press the power switch to check whether the indicator light responds, if the indicator can change color, it means that the motherboard is working normally.

5. Then check whether the connection cable of the motherboard signal output to the screen has poor contact (the connection cable or screen can be replaced). Check whether the voltage of each working point of the motherboard is normal, especially the power supply voltage of the screen.

6. Finally, use an oscilloscope to check the field signal and clock signal (from input to output), and replace it with a general board to write a program.

LCD TVs have a blurred screen, which has an image on the screen, but the image is covered with dots, flakes, mosaics and other interference. The causes of such faults are: the TTL or LVDS signal formation part of the logic board, LCD screen, and computer board.

When repairing this fault, the first thing to distinguish is whether the cause of the fault is on the logic board, LCD, or LVDS signal.

1. The cause of the failure of the LCD TV and the failure of the computer board and chip repaired. Generally speaking, the user menu is normal, but the image appears blurred. The problem is usually in the computer board and the Scaler processing chip circuit.

In this case, you can ask the maintenance worker to repair the welding judgment, by pressing the chip, observe whether there is a significant change in the screen phenomenon, if there is an obvious change, it is caused by the virtual soldering of the chip, use a special tool, such as a heat gun to heat the IC, and re-repair the poor contact foot.

2. The cause of the LCD TV screen failure and the poor contact of the LVDS plug-in cable for maintenance. If the screen has a blurred screen or an irregular blurred screen, it is common to have poor contact with the LVDS plug-in cable. At this point, you can clean up the cables.

3. The cause of the LCD TV's blur screen failure and the failure of the driver board for maintenance. If the user finds that the stripes and colors of the TV have changed after the TV screen is repeatedly powered on, then the driver board is generally faulty, and the driver board can be replaced.

4. Causes of LCD TV screen failure and screen failure of maintenance. If the flower screen is repeatedly powered on, the stripes and colors of the flowers have not changed, then the screen itself is broken, and the driver board has to be changed to test the screen at this time.

The self-study method of LCD TV screen will take you to understand what to do with TV screen.

The solution to the TV screen copying: bai

1.Try powering off and restarting the TV.

du2.If the TV screen is blurred from time to time, please update the TV system first.

3.Enter the daorecovery mode to clear the data and then turn it on.

Here's how to enter:

Devices equipped with infrared remote control as standard: After the TV is turned off, press and hold the home button menu button at the same time and do not let go, point the remote control at the infrared receiver position, and then press the TV power on button until it enters recovery mode and then let go.

Devices equipped with Bluetooth remote control as standard: After the TV is turned off, press and hold the confirm button at the same time and the return button will not let go, and then press the TV power on button until it enters recovery mode and then let go.

If none of the above methods can solve the problem, please apply for after-sales testing.

If there is no small board, you have to go back to the original factory.

There are generally three reasons why the display screen is blurred:

1. If the display is faulty, if it is a screen caused by a faulty board, the first board can be replaced. If the electronic components on the LCD screen soft belt are damaged and the flower screen is damaged, the maintenance cost is high, and it is recommended to replace the display;

2. The graphics card of the computer host is faulty, resulting in a blurred screen. Replace the graphics card;

3. Memory failure causes the screen to be blurred, and the memory is replaced.

1. If it is a blurred screen caused by display failure, focus on eliminating the influencing factors.

By inspecting the area around the display site and excluding equipment that has strong magnetic interference in the hall, the problem can be solved under normal circumstances. You can also open the case to check whether there is any poor contact inside the monitor, and whether there is any problem with the output terminal or output transformer of the power supply.

2. If the capacitor fails and the display screen is blurred, then just replace the aging capacitor or reset the resolution.

Generally, it is possible to troubleshoot, but since it is also a very high-tech job, it is recommended to send it for repair.

3. If the screen is blurred due to graphics card failure, focus on checking the heat sink and video memory of the graphics card.

Check the heat sink of the graphics card to see if the cooling fan has stopped and whether the heat sink is hot. Storage is an important part of the graphics card, just like the memory in the computer, which is responsible for temporary data access. When the video memory is damaged, the screen will appear when the system starts, which is manifested as confusion of characters and cannot be distinguished. If there is a problem with the video memory, then the video memory must be replaced, because replacing the video memory is a very high-tech job, so it is recommended to send it for repair; Some viruses will also appear when the screen is broken, and the screen at this time is not caused by hardware, so if you restart, you can also troubleshoot, but the root cause is to use antivirus software to thoroughly check and kill the virus.

Okay, Naga. 4. If the memory speed is too low, you can only replace the graphics card.

When the memory speed is too low to match the speed of the host, the screen will also be blurred, and the graphics card can only be replaced.

This answer is for PC models from brands like HP Zhan 99 Pro G2 MT.

1. The first trick: check whether the connection between the monitor and the graphics card is loose. Clutter and speckled screens are the most common phenomenon caused by poor contact.

2. The second trick: check whether the graphics card is overclocked. If the graphics card is overclocked, it will usually appear irregular and intermittent horizontal stripes. In this case, the overclocking amplitude should be reduced appropriately. Note that the first thing to do is to reduce the memory frequency.

3. The third trick: check the quality of the graphics card. If there is a problem with the blurred screen after replacing the graphics card, and it is in use.

After the first and second tricks fail to work, you should check whether the quality of the graphics card's anti-electromagnetic interference and electromagnetic shielding is passable. The specific method is: keep some parts that may produce electromagnetic interference away from the graphics card installation (such as hard disk) as far as possible and then see if the blurred screen disappears.

If you are sure that the electromagnetic shielding function of the graphics card is not up to standard, you should replace the graphics card or make your own shielding cover.

4. The fourth trick: check whether the resolution or refresh rate of the display is set too high. The resolution of the LCD display is generally lower than that of the CRT display, and if it exceeds the best resolution recommended by the manufacturer, there is a possibility that the screen will be blurred.

5. The fifth trick: check whether the incompatible graphics card driver is installed. This situation is generally overlooked, as graphics card drivers are being updated faster and faster (especially for NVIDIA graphics cards) and some users are always eager to install the latest version of the driver.

In fact, some of the latest drivers are either beta versions or optimized versions for a specific graphics card or game, and using them can sometimes lead to a blurred screen. Therefore, it is recommended that you try to use Microsoft-certified drivers, and it is best to use the drivers provided by the graphics card manufacturer.