No signal from computer monitor for an hour after turning on the computer? Reboot is good to make wh

If this happens on your computer, you can try the following methods to solve it:

1. CPU, graphics card and other accessories should not be overclocked too high, pay attention to the temperature, otherwise, it will restart or crash inexplicably when starting or running.

2. When replacing computer accessories, be sure to plug them in, because poor contact of accessories will cause the system to crash.

3. BIOS settings should be appropriate, although it is recommended to set BIOS to optimal, but the so-called optimal is not the best, sometimes the optimal settings will cause startup or operation crashes, it is best to equip a stabilized power supply, so as not to cause a crash due to voltage instability.

Hello, depending on your situation, you can make the following judgment on your own:

Check whether the two sections of the VGA graphics card cable are plugged in.

Unplug the graphics card and check it, if there is too much dust inside, it will not work properly.

If both of the above are solved, the graphics card is damaged, and you can buy a new graphics card to replace it.

This phenomenon may be a problem with the graphics card, and when it is first booted, some of the capacitors do not work, resulting in the graphics card not working properly, which is a workmanship problem of the graphics card. It is recommended to try a different graphics card, and there will be similar situations if the graphics card is incompatible, but the current hardware incompatibility is relatively rare.

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Solution to no signal failure of the display after powering on:

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

Check whether the external wiring of the computer is properly connected, and poor wiring contact will also cause no signal failure of the display after booting. Plug and unplug the VGA cable, power cable, data cable, and other cables again to check whether there is a connection problem.

There is also a special case, that is, the display VGA cable is connected to the wrong position, and the machine with the discrete graphics card must connect the VGA cable to the interface of the discrete graphics card.

2. Check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged.

3. Dust is the first killer of computer failure, if the dust in the chassis is excessive, the memory, graphics card and slot are in poor contact, and the hardware is corroded. Therefore, it is necessary to clean the computer regularly. Clean the dust off the motherboard, wipe the gold finger with an eraser, and check if the computer is normal.

4. Motherboard. 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 of the corresponding power supply circuit decreasing, and also causing the occurrence of no signal failure of the display after the computer is turned on.

Unplug the reset cable on the motherboard and connect it with other switches and indicator lights, and then use a screwdriver to short-circuit the switch to see if it can turn on normally.

5. If you can't turn on the computer, use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and check whether the computer can be turned on.

Then connect the above devices to the computer one by one, when connected to a certain device, the display after booting no signal fault reproduces, indicating that the fault is caused by this equipment, focus on checking this equipment.

6. Check the memory, graphics card, CPU, and motherboard.

Use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal, and replace the damaged devices if the devices are damaged.

This must be that the computer host has not started at all, generally in this case, you can take out the memory module, check the gold finger of the memory module with an eraser, install it, and then take out the battery of the motherboard, discharge the motherboard, and consider the hard disk problem if it is not possible to install it.

This is caused by a hardware failure that the dot does not light up.

Hardware failures need to be determined by a replacement method.

Method: Reseat the memory and boot it. If you can't replace the memory slot, you can't use an eraser to wipe the gold finger and insert it.

If it still doesn't light up, replace the memory to rule out whether there is a problem with the original memory.

The same method is used to unplug the graphics card, power supply and other hardware.

This solution is applicable to XP Vista Win7 system.

Problem Description]:

No display and no alarm when powered on.

Cause Analysis]:

Hardware issues such as motherboards, memory, data cables, and power cables.

Solution]:

1.If the mouse and keyboard light is not on, you can turn off the power cord of the host, and press the power switch on the host computer for 10 consecutive times with your hand to release the static electricity. If you have experience with chassis activation, re-inserting the memory module will usually solve the problem.

This kind of problem can basically be judged to be a problem with the motherboard and memory, especially the brand machine; If the motherboard and memory do not have normal self-check, it can usually be solved by re-inserting and removing the memory module, but if this problem occurs repeatedly and frequently, it is recommended to repair it, and the basic maintenance method adopted by the maintenance point or after-sales service is to replace the motherboard or memory.

2.If the mouse and keyboard light is on, you can plug and unplug the monitor data cable and power cable to troubleshoot. If there is a sound entering the system, the monitor is not displayed, you can also test it by the replacement method (the display is connected to other hosts), it is not ruled out that the display is faulty, first check the display interface and the display cable connecting the graphics card after the chassis is prepared.

It's not that the keyboard is not powered on, your computer is not lit, and the keyboard light is of course not lit. You have to see if there is a possibility of moisture, use a hair dryer to blow the dust inside, unplug the graphics card, memory module, power supply, hard disk, and plug it back in. Wipe the place of the gold finger with paper.

Thank you for adopting.

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 it back into a memory slot), it's OK, if there is an independent graphics card, you can also 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, (take the memory ** as follows:)

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.

The fourth reason: is that there is a problem with the boot circuit of the motherboard, such as clock, reset, CPU power supply, MOS tube, etc., which may cause failure to boot, as well as I o, south bridge, etc

The question can be turned on, but the display shows no signal.

I don't know much about what you said, I don't know how to get it, what to do.

Take a closer look, I've written all the workarounds at the back.

Just plug the connected cable back in or replace it.

Try this first.

Asking questions, I tried it or it didn't work.

Answer processing method: 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 it back into the memory slot (or insert it back into the memory slot), it's OK, if there is an independent graphics card, you can also 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, more 12 pieces

It's a problem with the graphics card, carefully remove the graphics card, use an eraser to clean the oxide layer on the interface, and then install it back to solve it.

Check the cables of your computer!

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!

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!

There is no signal on the computer boot monitor, teach you 5 solutions.

If there is a problem with the system, you can try to boot up and press F8 to enable the last correct configuration.