Skeleton Man wrote:

These are rarely repaired, however often the problem is bad electrolytic
capacitors. Occasionally one will grenade in such a way as to cook

virtually

every semiconductor in it, but often they just refuse to start up. Check

the

standby power supply, if that's ok then try to figure out why the main one
won't start up.


I think you may be onto something.. I took a closer look and several
capacitors appear to be bulging a bit at the top.. one does have brown
stuff around the edge, but I figured this was rust or crap that collects
like dust, etc.. (but none of the others have this).. all the capacitors
in question are 1000uF - 2200uF, 10 - 16V.. the small ones look fine..

Since you also said there aren't any burn marks or bad smells, my guess
is the caps are bad. That could certainly account for the symptom.

If it's the right vintage, you may be a victim of this:

http://www.siliconchip.com.au/cms/A_30328/article.html


As for standby power, yes I get +5VSB, it just refuses to turn on and
deliver the rest.. is this common ? I'm guessing there is a seperate
circuit for standby voltage ?

Chris




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