Win7 system computer boot screen black screen host still running how to solve?

Analysis of the cause:
The computer runs the screen after the computer is turned on. The black screen shows no input. The motherboard bios self-test does not pass, the display wiring, the hardware is loose, and the display failure may occur.

Solution:
1, first reconnect the monitor wiring or replace the wiring.
2, if the host has dual graphics card to replace another graphics card test.
3, open the chassis to re-plug the memory, you can use the eraser to wipe the memory gold finger.
4, the motherboard discharge, unplug the motherboard power cord and display cable, find the button battery on the motherboard, remove the battery after ten minutes and then re-install and then boot.
5, if the above methods have been tried, or not. It is recommended to replace the other computer monitor test. If the monitor is lit, it indicates that the original monitor is faulty. If the same is not lit, the host has a problem. In this case, it is recommended to repair the hardware.