Having problems with your Dell Inspiron 9400 Notebook ?

Dell Inspiron 9400 display goes blank after a few minutes

\015 After booting, the screen displays normally. A few minutes later (time varies) it goes blank and won't restore until the system is re-booted. There is no warning (nothing abnormal about the display prior to going blank (no color or graphics)). The PC is about 3 years old and has been working normally. Due to a virus, the hard disk was re-formatted and re-loaded about 2 months ago.\015

Answers :

If the issue occurs in the safe mode, then I'm suspecting a failure of the LCD backlight. (It warms up and quits) Also see if video stays on using an external monitor. If it does, then the LCD is most likely failing.
\015\012If video goes out on an external monitor as well, then the Video card is failing due to overheating. Make sure all vents are free of dust (Clean with canned compressed air) and the all fans are functional (Run the fan test in diagnostics) If fans check up, then video card is failure point. If fans fail diags, replace affected fan 1st
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