Apple power supply problems

From: John Foust <jfoust_at_threedee.com>
Date: Thu Oct 8 14:01:14 1998

At 12:45 PM 10/8/98 -0400, Charles A Davis wrote:
>>
>> And sometimes when you do that, the dead chips will notify you
>> of their new condition by blowing their tops.
>
>That is also a sometimmes useful method of finding where the problem
>resides.

Sounds like a "space between the ears" problem with the technician,
if they expect that to be a useful way of diagnosing the problem.
You are correct: a blown chip tells you where a problem now resides.
It tells you nothing about where the problem *was* before you
shorted the fuse. It was, after all, a *circuit*, meaning one
thing is connected to the next, and all you discovered is which
component will blow up / heat up / char along the way.

- John
Received on Thu Oct 08 1998 - 14:01:14 BST