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russusFlag for United Kingdom of Great Britain and Northern Ireland

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laptop screen glitch deffected

Experts,

Need your help.
this landed on my lap. Please see attached images; any idea what's causing the screen going funny like that?
what tests should i do to determine the cause?

Thank you for your help
2016-11-08-10.20.37.jpg
2016-11-08-10.20.29.jpg
2016-11-08-10.20.07.jpg
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David Johnson, CD
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Thanks David, I'm running mdsched.exe memory test now, will try the memtest afterwards if needed.
please see new img attached; sometimes when i restart, the screen splits into 4.

btw, under device manager i can't see the model of graphic card anymore. it should say nvidia gtx 580 . now it only shows "vga standard...".
what's the best way to test the graphic card?
2016-11-08-11.50.08.jpg
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ASKER

thanks Rindi, yes memory test came out okay so it must be the graphics card sadly.
thank you for your help
i have had good results when i could renew the heat paste on the video chip - so worth a try
while doing this, renew the cpu heatpaste also, and of course, clean the system from dust, and verify the fans are running ok
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ASKER

thanks nobus, too late now i sent it back to its owner
if no more help is needed - plse close this Q
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thank you