Solution: You remove the interface behind the monitor and clean it up, and then try to connect it again. Be careful not to connect the interface upside down. If there is no problem with the contact, it is better to try a different monitor to determine whether there is a problem.

Poor memory contact

Solution: If there is something wrong with the memory stick, there will be a beep. If there is an alarm, open the case, take out the memory module and wipe it with anhydrous alcohol or eraser, and try to plug it in again or change the slot. Be careful not to insert the memory stick backwards.

Poor contact of graphics card

You take out the video card and clean it up, and then try to connect again. If there is no problem with the contact, it is best to find someone to borrow a graphics card to try, so as to determine whether it is a graphics card problem.

The floppy drive is not started normally.

Sometimes improper startup of floppy drive will cause the computer to boot or restart the black screen. In order to avoid this situation, you can also cancel the floppy drive boot item in the BIOS, press DEL to boot into the BIOS, and then select advancedbiossetup. If you see the floppy drive, change it to HDD-0 or IDE-0.

System settings cause an incorrect black screen.

Solution: Right-click the desktop and select Properties-Screen Saver-Do not set the screen or other screen savers, and set the waiting time to be longer.