What is the reason why the monitor prompts Unable to find signal when the computer is turned on?

Yesterday I repaired the computer and encountered a problem like you, I checked that it was used on the motherboard, and I unplugged the memory and erased it with an eraser, and then unplugged the graphics card and wiped it, and then the fault was solved, of course, I can't let him know that it's just wiped it, otherwise I won't receive the money, I hope you're satisfied.

Your situation is not directly related to the software, there are several places that will affect the display function, one: graphics card, you can try to pull out the graphics card, use the eraser to wipe the gold finger, and then install it. Two:

Memory module, dust will make it overpower abnormal, so there will be a phenomenon of restarting multiple times before it is normal, and the handling method is the same as above. These two points can probably be solved, and other problems are not suitable for novices to deal with on their own.

It may be that the cable connecting the monitor to the computer is loose.

I also encountered it once on my computer. Just unplug the memory module and wipe it. I don't know if yours is like that.

The reasons why the computer turns on and shows no signal are as follows; 1.If the monitor is normal, if the boot display is "no signal input", it may be that the host is not turned on, or the host and the monitor are not connected properly. In this case, turn on the console or unplug the cable and reconnect it.

2.If there is still no signal input, then open the main chassis to check whether the fan in the host is running and whether the hard disk light is flashing normally, and then check whether each component has any scorched metal objects caused by short circuits, and whether there is any scorching on the motherboard dates. 3.

If all of the above is a problem, you can clean the dust on the motherboard, unplug the reset cable on the motherboard bench, and other switches.

The cable connecting the display to the main unit may be loose if it is plugged in again.

If you have a problem, if the graphics card is normal, check the cables behind the monitor and the case!

There are several possibilities for the display to have no signal after the computer is turned on (several solutions to no signal input):

1. The memory is not plugged in, or the graphics card is not plugged in!

2. There is a problem with the graphics card, or a connection cable problem!

3. Power supply problems, whether the power supply can not keep up!

4. The most headache, the motherboard problem, this thing is broken!!

5: Check whether the monitor wiring is connected to the graphics card.

6: The motherboard is broken.

7. There is a problem with the operating system.

8. The pins of the monitor connector.

9. Resolution issues.

Corresponding workaround:

1. Reinstall the memory module and graphics card, be sure to be stable!

2. Replace the graphics card.

3. Buy a new power supply.

4. If the motherboard is broken, there is nothing to do but buy a new motherboard.

6. Reconnect the continuity between the monitor and the graphics card.

7. Find a professional to test the motherboard, or if possible, change a good board to test.

8. Reinstall the system.

9. The pin of the display connector.

10. Resolution problem, software problem is good, as long as it is not hardware, you can find another computer, connect to the display, set a lower resolution, and then take it to test! (The liquid crystal can only be 60 Hz, and it can't be fun).

1. There is the word "no signal" on the screen, indicating that the fault is not in the display, but:

1. Graphics card. Generally, the main control chip of the graphics card has poor characteristics, or the contact with the graphics card slot is not close, or there is too much dust in the graphics card slot;

2. Motherboard. Generally, the power dissipation of the on-board power circuit decreases, which makes the power supply of the graphics card insufficient, and the filter capacitor in the on-board power circuit is seriously leakage, resulting in the voltage reduction of the corresponding power supply circuit;

3. The data cable characteristics are poor, or the contact with the graphics card and display is not close;

This type of fault is characterized by the fact that the word "no signal" is displayed until the machine is shut down or restarted;

Second, if the word "no signal" disappears after only a few seconds of display, then it is likely that the memory module characteristics are poor, or the memory module is not plugged in properly, or there is too much dust in the memory slot;

It is estimated that the problem of the landlord's computer belongs to the first item, and it is recommended to start with the data line first.