Display FAQs and solutions? - SZ DJS Co.，Ltd.

Display FAQs and solutions?

Common fault one: The screen of the monitor is very shaken when the computer is turned on. Sometimes even the icons and texts are not clear, but it will return to normal after a minute or two.

This phenomenon occurs mostly in wet weather and is caused by moisture inside the monitor. To completely solve this problem, use the moisture-proof sand in the food packaging to string together with the cotton thread, then open the back cover of the display and hang the moisture-proof sand near the neck of the tube neck near the tube seat. In this way, even in wet weather, the above "faults" will not occur again.

Common fault 2: After the computer is turned on, the monitor only smells its sound and is dark. It takes a few tens of minutes to appear.

This is caused by leakage of the display tube socket and the tube holder must be replaced. Disassemble the back cover to see a small circuit board at the end of the tube, and the tube holder is soldered to the board. Carefully unplug the board, solder the header, buy an identical header from the electronics store, and solder the header back to the board. Don't rush to put the board back at this time. First find a small piece of sandpaper. Carefully wipe the pins protruding from the rear of the tube with a sandpaper. In particular, pay attention to the oxide layer on the pin. If it is not cleaned, the old disease will recur. Put the board back and you're done.

Common fault 3: There are always lingering interference clutter or lines on the display screen, and there are also annoying noises in the speakers.

This phenomenon is mostly caused by poor anti-interference of the power supply. If you are too lazy to do so, you can replace it with a new one. If you have enough hands-on ability, you can try to replace the filter capacitor inside the power supply. This can often work. If the effect is not obvious, you can replace the switch tube.

Common fault four: display screen

This problem is mostly caused by the graphics card. If it is a new graphics card, it may be that the card quality is not good or incompatible, and then there is no correct driver installed. If the old card is added with video memory, it may be caused by the newly added video memory and the original memory model parameters.

Common fault five: black screen display

If there is no signal transmission to the display due to damage to the graphics card or display disconnection, the indicator light of the display will flash continuously to indicate that no signal is received. If the resolution is set too high, a black screen will appear if the resolution exceeds the maximum resolution of the display. If the display is destroyed, the current display has a protection function that automatically protects when the resolution exceeds the set value. In addition, hardware conflicts can also cause black screens.

The reasons for display jitter are as follows:

Display refresh rate is set too low

When the refresh rate of the display is set below 75Hz, the screen will often appear jittery and flickering, and the refresh rate will be raised appropriately. For example, if it is set higher than 85Hz, the phenomenon of screen jitter will not appear again.

The power transformer is too close to the display and the chassis.

When the power transformer is working, it will cause large electromagnetic interference, which will cause screen jitter. Keeping the power transformer away from the chassis and display can solve the problem.

Inferior power or power supply equipment has aged

Many of the components used in computer power supply are poor in workmanship and materials. It is easy to cause the computer's circuit to be poor or the power supply capacity can't keep up. When the system is busy, the display will especially appear on the screen. When the computer's power supply starts to age, it is also likely to cause the same problem.

The speaker is placed too close to the display

The magnetic field effect of the speaker will interfere with the normal operation of the display, causing the display to produce magnetic interference such as screen jitter and crosstalk.

Virus blame

Some computer viruses can upset the screen display, such as: character inversion, screen jitter, graphics flip display. The screen jitter scripts that are everywhere on the Internet are enough to be as big as a cow.

Poor contact on the display card

After reinserting the display card, the fault can be eliminated.

WIN95/98 system write cache caused

For this reason, disabling all drive-behind caches in Control Panel - System - Performance - File System - Troubleshooting will allow the problem to be solved.

Power supply filter capacitor is damaged

Open the chassis, if you see the top of the power filter capacitor (the largest capacitor on the board), then the capacitor is broken, the screen jitter is caused by the power failure. After changing the capacitor, you can solve the problem.