My pc freezes and screen shows signs of missing pixels

shvits

Distinguished
Oct 1, 2011
3
0
18,510
When I turn on my HP Pavilion Media Center with windows 7 installed, it freezes after 10 min of work. First signs of it appear when 3 or 4 pixels start showing and after all screen freezes. It is shaking and all kind of lines dots appear on it. Also colors become very light. When I use it on safe mode, it is just fine.No problems. I tried all kind of different test like, AIDA64,FurMark,etc.
Please help me identify my problem and the way to fix it.

Thanks a lot,

Eli.
 

ltrazaklt

Distinguished
Mar 14, 2010
193
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18,690
is the moniter cable ok ? ..sometimes people scrunch them up, and bend them , and after a while the kink in the line can cause problems with signal to the monitor..ok, soo Safe mode is fine ..have checked for any updates from HP, BIOS, Firmware, Drivers, etc ?