You can turn off the power, open the compartment, pull out the memory, rub the eraser back and forth at the golden finger (that is, where there is copper), and then insert it back into the memory slot (or insert it back into another memory slot). If you have a discrete graphics card, you can also handle it according to the above method, then plug it back into the graphics card slot, and finally install and restart the computer.

1. If the connection line between the computer host and the LCD screen is unplugged or damaged, a black screen will appear and the detection signal line will be displayed. You can insert link the cable again and restart it.

2. The memory is in poor contact with the slot of the graphics card and motherboard. For example, in the mobile host, it is accidentally brought to the graphics card, resulting in poor contact. So just turn on the computer mainframe, aim the eraser at the gold finger in the memory (that is, the part with copper) and rub it on both sides.