Win7 solution when switching dual graphics cards

            The black screen of the computer is a relatively serious problem in computer failure. Many computer novices are always worried about this situation and feel that the computer is completely broken. The general computer black screen will have wrong prompts, and the black screen will be solved according to the prompts, but the most frightening thing is that some black screens will not generate any prompts, which also makes the repair work impossible. This is not, recently a user responded that when he switched between dual graphics cards, the computer suddenly blacked out, and there was no prompt, I don't know what to do. The following small series lists several reasons for causing the computer black screen for reference. Come and see it!
1. If the win7 Ultimate computer has a black screen, the first thing you can do is to restart your Win7 flagship. After the computer is restarted, you can move the mouse to the taskbar window below, then click the right mouse button and select Start Task Manager in the sliding menu. After that, switch the window to the process column and compare the load. The big programs are all closed! Although there is no program open after restarting the computer, and some programs may be booted, this step is very important.
2. If the above operation can't solve the problem, you can right click on the computer icon of win7 Ultimate computer, then select Manage. In the computer management interface, click System Tools - Device Manager in the left menu, then Locate the graphics card driver in the right window and right click to upgrade the driver.
Computer black screen is not a terrible method. Under normal circumstances, you can try to restart. If you still can't solve it by restarting, try it one by one according to the above method! There is always a solution to the problem!