Question Strange Coloured Lines After Long Time Powered Down

Biglee2015

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Nov 30, 2015
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I'm getting strange coloured distortion on my display after a long period of powering down while I am away on holidays etc. The coloured lines/blocks disappear after 5 or so minutes of normal operation.
I can tell you its not drivers, firmware, or my actual display since it works perfectly otherwise.
I can only think of a cable or dust issue myself. But the PC was cleaned recently.( The graphics card was dismantled and cleaned as I always do.

Any ideas?
 

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