External monitor flickers and send the display to the laptop screen

I'm running Windows 7 on a ThinkPad. I have an external monitor from ViewSonic VX2433wm I connect and use scope display mode. This all worked fine for many months, and then a few months ago I started having a problem where, after several minutes, the ViewSonic and the computer screen will be time twinkle a few times and then just what is on the ViewSonic flies to the computer screen. I have updated the monitor display drivers and the laptop, but still have the problem. In addition, I discovered by chance yesterday that, even if the external monitor is turned off but connected to the laptop, the screen of the computer, still wobbles. It's driving me crazy!

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Hello

I suggest you try the following steps:

Step 1: change display settings also change color depth then test

http://Windows.Microsoft.com/en-us/Windows7/getting-the-best-display-on-your-monitor

Step 2: Flickering of the Correct monitor (refresh rate)

http://Windows.Microsoft.com/en-us/Windows7/correct-monitor-flicker-refresh-rate

Try using the display quality problems to solve the problem. It ensures that your video card driver is compatible Windows 7, and checks to see if your color grading, video effects and display settings are correct.

http://Windows.Microsoft.com/en-us/Windows7/open-the-display-quality-Troubleshooter

For more information, see the link below

Work-and-Play-Better-with-multiple-Monitors

http://Windows.Microsoft.com/en-us/Windows7/work-and-play-better-with-multiple-monitors

Troubleshooting-multiple-monitor-problems

http://Windows.Microsoft.com/en-us/Windows-Vista/troubleshoot-multiple-monitor-problems

I hope this helps.

Tags: Windows

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