LCD showing garbled display

[ranjan2001]

My lenovo LCD has shown this problem 4th time, but seeems that the issue is not realy with the LCD.

Here is the set up.
XP-SP2
19"LCD running with DVI input
XFX 7600GT card
500 watt Zebronics platinum PSU.

Suddenly while working normally the screen goes away & start showing garbled display, cant get that display fixed, if I restart then all gets fixed on its own.
Is the XFXcard getting heated up & causing this problem? I have 4 fans running in my Peace cabinet.

I have once reinstalled the latest nvidia driver for XFX 7600GT assuming that could be bcoz of some curropt driver.

[assasin]

first take out the gfx card,clean the slot and the card contact points with an eraser.then reinsert the card and test.run ur monitor using D-sub.
if problem persists then try out the card in ur frnd's pc and try a diff card in urs.
hope ur using the latest bios release 4 ur mobo.