New Power Supply but no power
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New Power Supply but no power
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Posted: Thu Nov 10, 2005 4:31 pm    Post subject: Re: New Power Supply but no power Reply with quote

Zentraleinheit@copper.net (REMOVE) wrote:
Quote:
Well, I tired what was surgested:

...disconnect AC, clear the motherboard CMOS, then reconnect AC
and retry the front case switch.

And when that did not work:

Connect only the following: CPU, CPU heatsink/fan, 1 memory module, video
Clear CMOS Turn on the motherboard by shorting the two power-on pins
(on the motherboard front panel header, where the switch plug goes) together

Still nothing!

So I started looking for fouled electrical contacts, burst capacitors, fan
failure on CPU heatsink.

I think I found something!

Three of the capacitors next to where the memory slots are have instead of
a flat shinny top have instead a slight bulging top with small brown
discoloration.

(I wish there was a way to post the pictures I made of them so you can see
what I was talking about)

So, if this is the (in this case) the "smoking capacitor" then my
motherboard has met its demise ;-(

George Macdonald once wrote

"Check the electrolytic capacitors on the mbrd for swelling tops or
leakage
near the base. There was a slew of mbrds a couple of years ago which
had
bad caps: http://www.niccomp.com/taiwanlowesr.htm. For examples:
http://www.badcaps.net/ & http://www.motherboardrepair.com/. "

those links have pictures and discussions.

just get a new mbrd, return that one.
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