|Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.|
Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .
This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
NOTE that you can also have bad capacitors on the board inside the power supply. You would need to remove the PS and open it up to determine that.
The only time I have heard bad capacitors leaking, it turned out to be they were inside a Sparkle brand power supply. You could hear the sound when the computer was not running, when the power supply was still hooked up to live AC power.
It sounded like a kettle does while warming up.
ATX power supplies are always powering some places on the ATX mboard, and the power supply is partially on, even when the computer / Windows is not running. If you hear the sound when the computer is not running but it's still hooked up to live AC power, then it's extremely likely your problem is bad capacitors.