How to solve the problem that there is no signal on the black screen when the computer is turned on?

If the data cable connection between the computer host and the monitor is loose, no signal will be transmitted to the monitor, and then check whether the video cable between the monitor and the computer host is inserted correctly. The causes and solutions of no signal on the monitor after the desktop is turned on are as follows:

1. The computer turns on a black screen, and the LCD screen shows "No signal", which may be due to poor contact between the desktop host and the video cable connected to the monitor.

In particular, the interface is not plugged in or loose, and there may be something wrong with the connected data cable. Just unplug the data cable. Or replace the data cable.

2, that is, the display memory of the graphics card appears virtual soldering, the performance of the main chip declines, the BIOS of the graphics card appears disorder, and the control power IC has problems, which will lead to the graphics card not working normally, that is, the graphics card is broken.

3. Because the gold finger surface of the memory or discrete graphics card forms an oxide layer, the memory and memory slot are in poor contact, and the graphics card and graphics card slot are in poor contact, resulting in a black screen and no signal output.

Precautions:

It is very important for computers to be dust-proof, and it is also necessary to carry out simple self-inspection on computers frequently.

When performing computer self-check, you should turn off the computer first.

Failure phenomenon: After the power-on key is pressed, the light of the CD-ROM drive flashes, the power indicator of the motherboard lights up, and the power supply is normal, but there is no display on the screen and no "click" sound.

Fault analysis: this phenomenon will occur after the cup is damaged. During the self-test, the BIOS will first check the CPU. If the CPU is damaged, it will not pass the self-test and the computer will not start.