OT: Need PC MB help! - test-drb@ccmp.vtda.org

24 Dec 1999

It's quite possible that the cache supply voltage and the main memory supply
voltage were set to different values while the board didn't know that and
hooked them together.  I did that about 5 years back.  That same mobo used a
cache simm which could be plugged in backward.  That wasn't good either.
Trying to fix the thing will take a lot of time and won't yield results
worth having.  Best to follow the suggestions below.

Dick
-----Original Message-----
From: John Foust &lt;jfoust(a)threedee.com&gt;
To: Discussion re-collecting of classic computers
&lt;classiccmp(a)u.washington.edu&gt;
Date: Friday, December 24, 1999 8:15 AM
Subject: Re: OT: Need PC MB help!

...
 At 08:53 PM 12/23/99 -0800, Sellam Ismail wrote:
 Anyway, I have a bad pentium MB that I'd like
to use for parts.  The
transistor that blew is HB1084 5C (what is that?)  The one on the salvage
MB is D45H2A.  Are they compatible?
I'm hoping one of you electronics gurus can help me out.  I have to get
this system rady cuz Santa's got to deliver it tomorrow. 
I called Santa's workshop, and they said it would be easier to
get the nephew a cheap Celeron motherboard from any ol' computer
shop in your well-stocked neighborhood, and fix the other MB some
other day.

Something went wrong to blow the transistor.  The transistor became
a fuse.  Replacing the transistor doesn't fix the problem.  When the
second transistor blows, you will receive enlightenment.

- John