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What’s wrong with no signal on the computer display screen? The Solution to Computer Unable to Turn on the Monitor and No Signal

Some friends must have experienced the problem where the monitor shows no signal as soon as the computer is turned on. Please check the video input. The host should be running normally, the fan is running, and the connection cable has also been unplugged. Why is this? Next, we will introduce the solution to the lack of signal on computer monitors.

What if there is no signal on the computer monitor? The solution to the problem of no signal on the computer monitor is as follows: Troubleshooting the problem of no display when the computer is turned on.

Step 1: First, check if the external wiring of the computer is properly connected, plug in each wiring again, and see if the problem is resolved.

Step 2: If the fault persists, then open the main unit box to check if there are any excess metal objects or short circuits caused by the deformation of the motherboard. Smell if there is any burnt paste inside the chassis, if there are burnt chips on the motherboard, and if the capacitors around the CPU are damaged.

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

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

Step 5: If the computer cannot be turned on, then use the minimum system method to unplug the data cables of the hard drive, floppy drive, and optical drive, and check if the computer can be turned on. If the computer monitor shows a power on screen, it indicates that the problem lies in these devices. Next, connect the above devices 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.

Step 6: If the fault persists, it may be caused by devices such as memory, graphics card, CPU, motherboard, etc. Then check whether the memory, graphics card, CPU and other devices are normal by using the plug and pull method, exchange method and other methods. If there is any damaged device, replace the damaged device.

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

The above steps have introduced a solution to the problem of the computer not being able to turn on the monitor and no signal. We hope it will be helpful to everyone. If you have any questions, please feel free to leave a message and the editor will reply to you in a timely manner. Thank you very much for your support of the website!

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