How to solve the black screen when Windows7 switches dual graphics cards

Every Win7 system user knows that there are many reasons for the black screen of the computer. We can solve the problem according to the error code of the prompt, but there is also a black screen with no error code prompt. Today, there is a customer who reflects his computer's black screen on the computer that switches dual graphics cards. What is the matter?

1. If the win7 Ultimate computer has a black screen, the first thing you can do is to restart your Win7 Ultimate computer. After rebooting, you can move the mouse to the taskbar window below, and then click Right mouse button, select Start Task Manager in the slide menu, then switch the window to the process column, and close all the programs with larger load! Although there is no program open after restarting the computer, and then some programs may be booted, this step is very important.
2. If the above operation can not solve the problem, you can right click on the computer icon of win7 Ultimate computer, and 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.
The above is about the Win7 computer when switching dual graphics card when the black screen solution, generally encountered the problem of the black screen first must first try to restart the computer, after restarting or black screen, then see the specific reasons where And then find a solution.