Skeleton Man wrote:

> I just put together my Athlon 64 X2 5200+ system (overclocked to around
> 3Ghz) and it appears the load was more than my Wintech 350W could handle (as
> it died very suddenly).. It still supplies 5V standby, but it refuses to
> turn on nomatter what..

> I pulled the cover off and it gave off a weird smell, but it was only faint
> and nothing appears burned.. (usually when a PSU goes there's remanents of
> charcoaled components).. Where should I start in diagnosing the problem ?
> (and no I am not going to just throw it out)

An AT PSU repair guide. It applies to AT PSUs but should still be
useful for ATX PSUs:

http://www.nutsvolts.com/PDF_Files/PSRepair.pdf

Lots of switching PSU repair information from the RepairFAQ.org,
edited by Sam Goldwasser:

http://repairfaq.cis.upenn.edu/REPAIR/F_smpsfaq.html

I'm no expert, but I find that ATX PSUs are so crowded inside that
it's very difficult to take measurements without removing the circuit
board from the case for access to the bottom of the big circuit
board. BTW, don't touch the big heatsink containing the high voltage
components because many 170VDC on them. I don't think that Wintech's
do, but I've measured 170V on Delta, Enermax, and Antec (Channel Well
mfg.) heatsinks.

I'd rather work on the PSU with the AC cord unplugged and the big
capacitors discharged and measure the fuses, transistors, and diodes
with an ohmmeter or diode checker. You may have to remove them to
gain access, and often the easiest way to by unsoldering all of them
and lifting out the whole heatsink.