Screen flicker for Mac Mini

I got the Mac Mini for about one week. When I connect it to my LG W1952TQ monitor, the monitor become flicker.  I have to turn the monitor off for several times and wait for the Mac mini to warm up before the monitor screen improved.
Did anyone got any solution to the problem?  Pleae help.

Information.
Video Troubleshooting Internal and External Monitors
https://discussions.apple.com/message/17736716#17736716

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