Why is the monitor unresponsive even though the computer can be turned on?

Reasons and solutions for why the computer can be turned on but the monitor does not respond: 1. Connection problem, check whether the connection cable between the host and the monitor is normal, and then check whether the monitor is powered on; 2. Monitor hardware problem, check the signal light on the monitor screen Is it normal? 3. Host problem, check whether the host memory or motherboard is faulty.

Operating system for this tutorial: Windows 10 system, DELL G3 computer.

1. Troubleshoot the connection problem first:

1. The host and monitor are connected through VGA (or HDMI, DVI, etc. interface). Check whether the connection is normal and whether there is any looseness.

#2. Check that there is no problem with the connection cable between the host and the monitor, and then check whether the monitor is powered on. Both the computer host and the monitor need a power cord to power on, usually with a plug like the one shown below:

2. Troubleshoot monitor hardware problems:

There is no problem with the hardware connection and power supply between the monitor and the computer host. After powering on, check whether the signal light on the monitor screen is on normally.

1. If the monitor signal light does not light up, you can change a VGA (or HDMI, DVI, etc. interface) cable to connect it to the computer, because it is impossible to check with the naked eye whether there is a problem inside the monitor and it needs to be eliminated. .

2. After replacing the VGA (or HDMI, DVI, etc. interface) cable, but the monitor signal still does not light up, it is most likely that the monitor is faulty.

3. Troubleshoot the host problem:

If the monitor signal light is on, the host listens to the sound and operates normally, but the monitor still displays abnormally. If the screen is black, you can turn off the power, disassemble the host, re-insert and unplug the graphics card and memory module, clean the dust, and try restarting the computer.

If the screen still does not light up, the graphics card interface may be damaged. You can also check whether the host memory or motherboard is faulty. These can be left to professionals for disassembly and inspection, and pay attention to safety.

Under normal circumstances, this kind of fault phenomenon is that the host lights up normally when the computer is turned on, but the monitor shows no signal prompt. This requires observing whether the small keyboard indicator light on the keyboard lights up normally. If you press the Num Lock key on the keypad and the indicator light does not respond, you need to check for poor hardware contact.

Anyone with a little bit of hands-on ability can dismantle the computer case side cover by themselves. The method is very simple. First turn off the power, then use a screwdriver to unscrew the screws on the side of the main chassis and open the side cover of the chassis. Remove the memory stick, use rubber glue to clean the gold tabs on the memory stick, and use a toothbrush to clean the dust inside the memory slot. Then reinstall the memory module, connect the power supply and restart the computer to solve the problem.

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