Desktop monitors have no signal input as follows

Desktop monitor has no signal input for the reason:

1. The cable of the monitor is loose or damaged;

2. The monitor socket or graphics card socket is damaged;

3. Display problems;

4. The graphics card is faulty.

Solution: 1. Re-plug the monitor cable, both ends should be detected, and re-plugged in, if there is a spare cable, it is recommended to replace the spare display cable;

2. Detect whether the socket is bent or damaged by the needle angle, if so, the socket needs to be repaired or replaced;

3. Replace a monitor and re-test it to eliminate the display problem;

4. Replace a graphics card, reinstall the graphics card driver, and then test it.

Hello, I've seen a lot of you, it's a power supply problem, I hope you can change the power supply.

Friend, I suggest you take the console and monitor to the computer store for maintenance, I have also encountered this kind of problem; There are three situations without signal input: first, the power supply problem of the display, the solution, check the line; If it doesn't work, it's a problem with the power supply. Second, the problem of the picture tube may be the reason for the long time; There was a problem with the picture tube; So the question you said arises.

3. In fact, it doesn't matter if you say this article or not, there will be no signal input if the standby time is too long after the computer is turned on, of course, it will be restored when you touch the computer again.

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. The power dissipation of the onboard power circuit of the motherboard decreases, which makes the power supply of the graphics card insufficient, and the filter capacitor in the onboard power circuit is seriously leakage, resulting in the voltage of the corresponding power supply circuit decreasing, and it will also cause 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.

7. If the memory, graphics card, CPU and other devices are normal, check the BIOS. Discharge the BIOS, use the isolation method, place the motherboard outside the case, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If there is still no signal failure of the monitor after booting, you can only return the motherboard to the manufacturer for repair.

8. After the computer is turned on, the system BIOS starts to power on the self-test, and when it detects an error in a device in the computer, it will send out a sound to report the error. Therefore, there may be a failure of the display with no signal and alarm sound. If there is no signal and alarm sound failure on the display after the computer is turned on, you can check the faulty equipment according to the meaning of the BIOS alarm sound to eliminate the fault.

1.It may be that the computer cable is loose, please check whether the VGA and the host connected to the computer monitor are loose first, if there is a loose situation, please reconnect the cable, if it still doesn't work, you can try a better VGA cable to solve the problem.

2.If the memory in the console is loose or improperly removed, it will also cause the computer display to have no signal. You can open the main case, remove the storage stick, wipe the gold finger, and plug it back in to see if the problem can be resolved.

3.Too much dust in your computer may cause no signal from your monitor. So, you just need to clean up the dust on your computer.

1.Check if the data cable is loose or damaged, and tighten it if it is loose. If not, find a new one and test it.

2.If the computer monitor shows no signal for a while, and the screen goes black, the main problem must be on the computer host, and we will start repairing the graphics card and motherboard.

3.Graphics card: The above problems are generally caused by poor characteristics of the graphics card main control chip, or poor contact with the graphics card slot, or too much dust in the graphics card slot.

We can disassemble the console, find the graphics card, unplug it, clear the card slot, and plug it back in. Start seeing if it works.

4.Motherboard problems: The above problems are generally caused by the power dissipation of the onboard power circuit, which makes the power supply of the graphics card insufficient, and the capacitor is seriously leakage, resulting in a decrease in the voltage of the corresponding power supply circuit.

Disassemble the main unit, find the battery, deduct it, leave it for a few minutes, discharge it, and then reinstall it.

5.If it still can't be solved after checking, it is necessary to consider whether it is the cause of static electricity on the motherboard. Solution: Unplug the power cord of the host, press and hold the switch button of the host for a long time (about 3-5 minutes), and then plug in the power cord to turn on the machine, which can generally be solved.

Display:

Usually because the display does not support the display mode sent by the host, it is often higher than the display mode of the monitor, causing the image of the screen to be confused, and the images and text on the screen cannot be seen clearly. If it is a monitor with automatic pattern recognition, it may be a black screen, but the indicator under the panel is green.

At this time, you can restart the computer to enter the safe mode, change the display mode to 640*480, and then start the computer again to recover. If this method does not work, you can delete the graphics driver in safe mode and reinstall the graphics driver in normal mode.

There is also a confusion in the fixed position on the screen when the graphics card's video memory fails, while the display is normal elsewhere. There are also individual graphics card damage that causes the screen to blur, but the probability of this situation is very small.

Such failures are generally due to the following reasons:

1.The graphics card is in poor contact with the signal cable of the display, and it should be reinstalled.

2.The monitor itself is faulty, and this requires the display to be replaced.

Hello, dear. You can follow the following steps: 1. It may be that the connection between the desktop host and the monitor is not in good contact. Poor contact between memory and memory slots, poor contact between graphics card and graphics card slots, problems with graphics cards, etc.

2. Just re-plug the connected data bridge cable, or replace the data cable.

3. You can turn off the power first, open the compartment, dial out the memory, and use the eraser to wipe the part of the gold finger back and forth a few times. If you have a discrete graphics card, you can use the same method as above to deal with the graphics card, then insert it back into the graphics card slot, and finally install it, and restart the computer.