Computer monitor does not light up

Solution to the problem that the computer monitor does not light up: First check whether the external cable is connected properly and re-plug the cable; then clean the gray layer on the motherboard; then use the minimum system method to troubleshoot the hard disk, floppy disk and optical drive ; Finally, you can check the faulty device according to the meaning of the BIOS alarm sound.

The computer monitor does not light up

Sometimes we encounter the situation where the computer monitor does not light up, how to solve this problem Well, here is a list of solutions to why the computer monitor does not light up. I hope it will be helpful to you.

1. First, check whether the external wiring of the computer is connected properly, and re-plug each connection to see if the fault is eliminated.

2. If the fault persists, then open the main case and check to see if there are any excess metal objects in the case or a short circuit caused by the deformation of the motherboard. Smell whether there is a burning smell in the case and whether there is any burned motherboard. Whether the capacitors around the chip and CPU are damaged, etc.

3. If not, then clean the dust on the motherboard and check whether the computer is normal.

4. If the fault persists, unplug the Reset line and other switch and indicator light connections on the motherboard, and then use a screwdriver to short-circuit the switch to see if it can be turned on.

5. If the computer cannot be turned on, use the minimum system method to unplug the data cables of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. If a startup screen appears on the computer monitor, it means that the problem lies in these areas. devices. Then connect more than one device to the computer one by one. When a certain device is connected, the fault reappears, indicating that the fault is caused by this device. Finally, focus on checking this device.

6. If the fault persists, the fault may be caused by memory, graphics card, CPU, motherboard and other equipment. Then use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal. If there is any damaged equipment, replace the damaged equipment.

7. If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, and connect the memory, graphics card, CPU, etc. for testing. If the computer can display , and then install the motherboard into the chassis and test until the cause of the fault is found. If the fault persists, the motherboard needs to be returned to the manufacturer for repair.

8. There is no display but an alarm sound when the computer is turned on. When the computer is turned on, the system BIOS starts to perform POST (power-on self-test). When a fatal error is detected in a device in the computer. , the speaker will be controlled to make a sound to report an error. Therefore, there may be a problem that there is no display and alarm sound when the power is turned on. For problems with no display and alarm sound when the computer is turned on, you can check the faulty device according to the meaning of the BIOS alarm sound to eliminate the fault.

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