Sudden blank display

Hi! As i am new,can't find out how to customize my profile, so sorry.My new pc is having a problem.15 minutes after booting pc display becomes blank,pc doesn't respond.No problem with monitor.I checked with other pcs.Plz help and let me know how can i customize.Intel Dual core@3.06ghz,2gb ddr3,g41 chipset and elitegroup g41tm7 mobo.
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More about sudden blank display
  1. go to control panel--power options and check whether turn off display after 15 minutes

    is set--if so change it to never

    or just try the high performance profile
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