Looks like the electrolytic capacitors lost capacity (have bad esr), due to
cost we normally replace them when not ok.

If you have an esr-meter available you can measure then the caps in-circuit
and replace the bad ones. But a new power supply is probably cheaper then
the repair cost.

Greetings Peter

"hupjack" hupjack_nospamtoday_yahoo.com schreef in bericht
...
I've got your joe-average ATX case and I can hear a faint hissing coming
from the power supply even after the computer is shut down. I can kill
the sound by flipping the switch on the back of the power supply (which
kills power into the psu). I know "faint hissing" isn't super
descriptive, but can anybody tell me whether I should be afraid of this
psu? Is in the process of frying itself? its capacitor? or some other
part that I'd rather not fry? Or is it no big deal and some psus make a
bit of noise? I don't have any past experience with this hardware, so I'm
afraid I can't say if it used to be quieter or not.

Thanks,
Ethan

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