Hi
Den Mon, 26 Sep 2005 20:30:51 -0700. skrev :

snip
found out that a certain TTL transistor is responsible for latching the
circuit from POWER_OFF to POWER_ON, the problem is, Im not pretty sure
if this is the right diagnosis, and if there are other possibilities
why this PSU wouldnt power up.

That's proberly not the problem, there will be a 100 other reasons. Is
folds back for safety reasons, indicating that there is a problem with the
output voltages.

My best bet is capacitors, capacitors and capacitor. Replace all
electrolytics, except the primary ones (2 fat ones rated 350v or so) and
you're back in business. Remember to use 105deg low esr types.

I would really appreciate if anybody can give an insight to this, I
would give further details on my troubleshooting if asked.

http://repairfaq.ece.drexel.edu/sam/smpsfaq.htm

An excellent introduction. Read it and understand it.

Best whishes
--
Med venlig hilsen

Christian Treldal