What should I do if there is no signal on the monitor after the computer is turned on?

Solutions to the problem of no signal on the monitor when the computer is turned on: 1. Reconnect the monitor and graphics card cables; 2. Remove the memory stick, wipe the gold finger of the memory stick with an eraser, and then reinstall and secure it; 3. Remove the independent graphics card, wipe the gold finger of the graphics card with an eraser, and then reinstall and secure it.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer

What should I do if there is no signal on the monitor when the computer is turned on?

People often encounter the problem that the computer is turned on and the CPU fan is running normally, but the monitor prompts that there is no signal input. They don’t know how to deal with it. So today, we will tell you what causes this problem. The reasons and solutions, I hope it will be helpful to you!

1. Causes of the problem

1. The connecting cable between the monitor and graphics card is loose or damaged. (This is the most common)

2. Memory problem (not plugged in properly or the gold finger is oxidized).

3. Graphics card problem (not plugged in properly or the gold finger is oxidized).

4. Power supply problem, whether the power supply is insufficient.

5. Motherboard problem.

6. Monitor problems (high voltage board abnormality, backlight circuit failure, AD driver board failure)

2. Solution

Now that I know To determine the cause of the problem, we only need to prescribe the right medicine. The following is the corresponding solution to troubleshoot the problem step by step.

1. Reconnect the monitor and graphics card cables (replace a VGA cable).

VGA cable diagram

2. Remove the memory stick and wipe it with an eraser Gold finger of the memory module, then reinstall and secure it.

The golden finger of the memory stick indicates the intention

3. You can first plug the VGA interface into On the integrated graphics card, if the problem is eliminated, it means that the problem is with the independent graphics card. Then remove the independent graphics card, wipe the gold finger of the graphics card with an eraser, and then reinstall and fix it.

##Independent graphics card gold finger indication intention

4, Computer Power supply detection method: You only need to short-circuit the green and black wires. Short-circuit the green wire of the "PS-ON" end of the power supply and the ground (any black wire). If the power fan rotates, it means there is no problem with the power supply. If it doesn't turn on, replace the computer power supply. Generally speaking, if the power supply fan is rotating normally, there is nothing wrong with the power supply.

5. If the motherboard is broken, ask a professional maintenance person to check it.

6. If there is any problem with the monitor itself, please contact a professional maintenance personnel to check it.

Warm Tips

When looking for problems, be sure to prevent static electricity. Static electrodes can easily damage integrated circuits, so before installation, it is best to touch the grounded conductor or wash your hands to release any static electricity that may be carried on your body. If possible, you can wear an electrostatic ring to effectively avoid static electricity problems.

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