The computer monitor suddenly goes black. What should I do if I restart it?

If the screen suddenly closes, there may be four reasons:

The first reason: the memory or the gold finger of the graphics card is oxidized, which leads to poor contact between the memory and the memory slot, and the poor contact between the graphics card and the graphics card slot, which leads to the failure to boot and the natural black screen. Solution: Turn off the power supply, open the chassis, remove the memory and discrete graphics card, wipe both sides of the gold finger (that is, the part with copper sheet) of the memory with an eraser a few times, and then plug it back in. Discrete graphics cards are handled in the same way.

The second reason: the display memory of the graphics card appears virtual soldering, the performance of the main chip decreases, the BIOS of the graphics card appears disorder, and the control power IC has problems, all of which will cause the graphics card to fail to work normally, that is, the graphics card is broken, the natural computer can't display it, and the screen will be black when it is turned on. Jane repairs the video card or replaces it.

The third reason: the problem of power supply. If the filter capacitor of the power supply bulges and leaks, there will be leakage. When the power supply is insufficient, there is not enough voltage and current for the host to start. The power supply self-protection circuit starts to protect itself, and when there is no power, it is naturally a black screen. The treatment method can only replace the power supply.

The fourth reason: If the host is normal, the cable is normal, or the screen is black, it is a problem with LCD display. When any link of power supply circuit, high-voltage board circuit and driving board circuit has problems, such as large bulge of filter capacitor, open circuit of switch tube, open circuit of high-voltage package, damage of lamp tube, damage of MCU chip, damage of power supply regulator, poor contact of screen wire, etc. The LCD will go black, so at this time. (If within the scope of warranty and after-sales service)

The fifth reason: there is something wrong with the motherboard boot circuit, or the CPU power supply is abnormal, the north bridge is damaged, etc., which will cause boot, black screen and no response from the host. Solution: Repair the motherboard (if it is under warranty and after-sales service).

The first reason is the most likely.