The content of this article on how to solve the problem of black screen on laptop is as follows:

1. 10 cases of black screen at startup and solutions

1. The screen is black when the computer is turned on, only the indicator light is on, and there is no response from the host. You can't feel the fan spinning when you reach behind the console. There is no voltage measured on all channels. After removing it, it was found that the power adjustment tube was broken and replaced with a normal one.

2. A long alarm sounds when turning on the computer, which should be a memory failure. Unplug the memory, clean the gold finger, and insert it normally.

3. The power supply and CPU fan are normal when the computer is turned on, but there is no response on the screen and no self-check sound. This machine adopts the SLOT1 structure, the CPU is prone to poor contact, and reinstallation is normal.

4. The power-on self-test is normal, but the screen does not light up. According to the owner, unplug the display signal cable at the back. When I pulled it out, I saw that one of the pins was bent.

5. The boot screen does not light up. The machine does not self-check. Use the meter pin to short-circuit the startup terminal on the motherboard to start normally. It turned out that the start switch on the panel was broken.

6. There is no self-check when turning on the machine. Check that the power supply is normal. Using the minimal system method, the machine can start normally when the optical drive is unplugged. Reinstall the fault again. It means that there is a problem with the optical drive and the machine cannot start. This example should attract the attention of peers.

7. The machine does not start when it is turned on. According to the owner, he changed the BIOS and wanted to overclock the CPU through the soft jumper, which caused this fault. Turn on the machine and discharge the motherboard (there are two pins on the motherboard for clearing BIOS settings) and then it becomes normal. It turns out that excessive overclocking caused the CPU to fail.

8. The fault is the same as 7. The owner entered the BIOS and set the machine to "optimized settings", resulting in a black screen. Process the same as above.

9. There is a self-check sound when turning on the computer, but the screen does not light up. Use the test card to check whether the host is faulty. Open the monitor and see that the signal line from the host computer needs to be soldered on the monitor motherboard. Re-soldering is normal.

10. Same as above. The output of the monitor's switching power supply is lower than the normal value. Check that the power switch IC is broken.