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Monitor displaying purplish colour and sometimes blinks

\015 Every time i switch on the PC the monitor displays a purplish colour in the background which comes clear sometimes to normal but other times the problem occurs again when i try to increase the monitors screen size\015

Answers :

Have you checked the cable that connects from PC to monitor ? If its VGA, it will be a 15 pin cable. please check both ends of the cable if any PIN is broker or bended. or remove it and tight it again. If that does not solve, the monitor will have some hardware issue.
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