14 Jun
2005
14 Jun
'05
6:28 p.m.
On Wed, 15 Jun 2005, Tony Duell wrote:
Good question. Upon pondering this, I can only conclude that holding the
switch in any particular position is not really what's making it work.
I'm left with the conclusion that I am either affecting something else
mechanically (such as the contact the power connector makes with the power
socket) or there is a marginal component or circuit that works sometimes
if the right conditions exist.
The power connector (barrel type) had a bit of oxidation on the contacts
which I tried to clean and scrape away. I got a fair amount off of it. I
never thought to check the voltage coming out on the other end of
connector, but I'll do that tonight.
Yes, I did
this. I can short the two leads of the switch but I get the
same symptoms. There's something wrong with the electronics.
When you say the 'same symptoms', what do you have to press/hold just
right for it to work? Assuming this is an electronic problem, I would first
test all the
electrolytics on an ESR meter. High-ESR capacitors cause the most odd
faults on SMPUSs...
I'll need to find one...
--
Sellam Ismail Vintage Computer Festival
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