What should I do if my laptop screen doesn't light up but it's turned on?

Solutions to the problem that the laptop display does not light up but is turned on: 1. Conduct a comprehensive check on the connection between the computer monitor and the host computer, and re-insert each connection to see if there is a connection 2. Clean the dust from the chassis; 3. Check the memory card, graphics card, CPU, motherboard, etc. for faults.

Solutions to the problem that the laptop display does not light up but is turned on:

1. First, let’s check the computer Conduct a comprehensive check on the connection between the monitor and the host, and re-plug each connection to see if there are any connection problems. If the fault still exists, then we need to open the case to see if it contains metal or other substances that may cause a short circuit in the computer host circuit. Then we smell the computer to see if there is a burning smell, and look around the motherboard and the CPU. Are there any damaged components around

#2. After checking the entire chassis, if there is no abnormality in the chassis, then we will deal with the dust on the chassis.

If the computer cannot be turned on, then use the minimal 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, the problem lies with these devices. middle. 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.

3. If the fault still exists, it is likely to be a fault with the memory card, graphics card, CPU, motherboard, etc. At this time, we only need to plug and unplug these hardware. Or replace it again and try one by one to find the cause.

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, connect the memory, graphics card, CPU, etc. for testing. If the computer can display, then 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.

4. There is no display but an alarm sounds when the computer is turned on. When the computer is turned on, the system BIOS starts POST (power-on self-test). When it detects that something in the computer is When a device has a fatal error, the speaker is controlled to make a sound to report the 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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