MSI K7T Pro death

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Subject: MSI K7T Pro death
Name: GrimRC
Date: 12/22/2001 7:59:34 AM (GMT-7)
IP Address:

Hi all. Friend of mine has an MSI K7T
(ver. 1 - only version?). It exhibited
very occassional problems resulting in
non-boot (complete failure and all D-LEDs
were red), particulary when it had been left
running for days. After being left off
for a while it would magically resolve

Recently though it refuses to boot at all, no
matter how long we leave it to "rest". We
believe it is related to its voltage
. I think it's a "2-phase"
design and the Semtech voltage regulator
(SC1155CSW or just SC1155 for short) gets
very hot now whenever we try to power it
up. Interestingly the (known-working) CPU stays
cold as though it's not being powered up.

We have replaced the motherboard (ECS SiS 730
incidentally) but would like to repair the old
one if it's possible. Would a straight swap of
this voltage regulator work (ignoring very
difficult soldering)? Is there any way to solve
the power regulation problems this motherboard
seems to have? Could we theoretically "upgrade"
the power regulation to "3-phase"? You'll have
to excuse me as I'm not an electrical engineer
(although am a physicist hehe).

I've heard whispers that this is a common
problem but I can't find any information through
Google. Any links to more information would be
very much appreciated.

Ideally it would be nice if we could fix this
motherboard's power regulation problem
altogether. Maybe just better cooling on the
regulators themselves?

Thanks all!

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