Request for Question Clarification by
26 Oct 2006 21:53 PDT
I would suspect your power supply. It might still be providing
power to the CPU and/or case fans and lights, but still be
failing to provide a proper or stable voltage to the video
card by way of the motherboard. I've seen it before...in
One bad design flaw in most power supplies is that they have
at least one fan which sucks air out of the power supply
through the back of the computer. Some even have an additional
fan blowing air into the PS from inside the computer. Either
way, all the dust (some of which tends to collect on the inside
of your computer) gets blown from the inside of your computer
and through the power supply. And, of course, the power supply
warranty will be voided if you open it up to clean it out.
Without being cleaned, power supplies collect an astonishing
amount of dust, which can eventually cause significant problems.
One symptom which will tell you for certain that it's the
power supply is, after disconnecting the main cable from
the motherboard, and all peripheral cables from the hard
drives, CD & DVD ROMS, floppy drive and fans (with the
main power cord removed from the power supply), plug the
main power cord back into the power supply and switch it
on. If you can hear a very high-pitched whine by placing
your ear close to the power supply, it's a sign of a
'leaky' capacitor, and a bad power supply.
Whoever sold you the computer may have the capacity to
test the power supply, but it wouldn't necessarily be
a conclusive test. I had one with a whining, leaky
capacitor that tested okay, according to the test staff,
but replacing it brought my monitor, and the rest of the
computer, to life.
Let me know if this helps...