(1) There is no beeping sound when the computer is turned on, and the monitor screen is black. This is because: an oxide layer is formed on the surface of the memory or the golden finger of the independent graphics card, resulting in poor contact between the memory and the memory slot, and the graphics card and the memory slot. Poor contact in the graphics card slot causes a black screen and inability to boot.

(2) Solution: You can cut off the power first, open the computer compartment, take out the memory, and use an eraser to wipe it back and forth against the gold finger area (that is, where there are copper pieces) A few times, then insert it back into the memory slot (or insert it into another memory slot), and it will be ok. If you have an independent graphics card, you can also handle the graphics card in the same way as above, then insert it back into the graphics card slot, finally install the computer, and restart the computer. It’s OK, (the picture of taking the memory is as follows:)