No signal from the computer monitor The monitor is good No alarm sound when doing the test What is t

The motherboard is a little more likely, or it may be a problem with the graphics card, you first unplug the graphics card and clean it up, as well as the memory, and try again.

Directly plugging in the memory module and graphics card can solve the problem 90% Remember to use an eraser to clean the gold finger If it doesn't work, it's basically a motherboard problem.

When a "no signal" prompt appears on your computer monitor, it usually means that the monitor is not receiving a **signal from your computer. This can be due to the following reasons:

1.Cable connection issues: The cable between the monitor and the computer may not be properly connected or loose, preventing the signal from being transmitted.

3.Display failure: The monitor itself may be faulty, such as damage to the screen and power failure.

4.Other hardware issues: Hardware failures such as motherboard, memory, etc. may also cause the monitor to fail to receive signals.

If there is a "no signal" prompt, you can first check whether the cable connection is stable, and plug and unplug the cable again to see if it can solve the problem. If the cable connection is working, you can try connecting your computer to a different display to see if it's the computer or the monitor itself. If that doesn't solve the problem, you may need to replace or repair the hardware.

Summary. Solution: You can turn off the power first, open the compartment, dial out the memory, use the eraser to wipe the part of the gold finger (that is, the place where there is a copper sheet,) back and forth a few times, and then insert it back into the memory slot (or insert it back into the memory slot), it's OK, if there is a separate graphics card, you can use the same method to deal with the graphics card, and then insert it back into the graphics card slot, and finally install the machine, restart the computer and it's OK, consultation record · on 2021-11-08

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If it is determined that the signal cable has been inserted into the host, it means that there is a problem with the wire, and the signal cable plugged into the host will not show the signal not detected regardless of whether it is not in the boot state.

The first reason: it is possible that the connection between the desktop host and the monitor is not well connected (especially the interface is not plugged in or loose), and there may be a problem with the connected data cable, so there will be no signal input to the screen, no display, black screen, solution: just re-plug the connected data cable, or replace this data cable.

The second reason: due to the formation of an oxide layer on the surface of the gold finger of the memory or independent graphics card, the memory and the memory slot are in poor contact, and the graphics card and the graphics card slot are in poor contact, resulting in a black screen and no signal output

Solution: You can turn off the power first, open the compartment, dial out the memory, use the eraser to the part of the gold finger (that is, where there is a copper sheet,) wipe back and forth a few times, and then insert back into the memory slot (or insert back into a memory slot), it's OK, if there is an independent graphics card, you can use the same method to deal with the graphics card, and then insert it back into the graphics card slot, and finally install the machine, restart the computer is OK, the second reason causes the proportion of boot "no signal" is the largest, accounting for 80%.

The third reason: that is, the graphics card's video memory is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, and naturally the computer will have no signal output, and it will not be displayed, and the screen will be black when it is turned on.

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