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Old April 6th 04, 10:17 PM
w_tom
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Same procedure reports what of three subsystem components is / is not
working. Takes but minutes to get necessary information if you come
equipted with necessary tool (3.5 digit multimeter) and knowledge.
Procedure may be found in "Computer doesnt start at all" in
alt.comp.hardware on 10 Jan 2004 at http://tinyurl.com/2t69q using
voltages in table:

Voltage Wire Color Min V Max V
+5 V Red 4.75 V 5.25 V
+12 V Yellow 11.4 V 12.6 V
+3.3 V Orange 3.135 V 3.465 V
+5VSB Purple 4.75 5.25
!Power On Green 0.8 2.0
Power OK Gray 2.4 when power is good

or in "I think my power supply is dead" in alt.comp.hardware on 5
Feb 2004 at http://www.tinyurl.com/2musa

With numerical data, then reason for problem is isolated to
motherboard, power supply, or power switch. Or the power supply
subsystem is found to be OK meaning we move on to other 'usual'
suspects.

(mike) wrote in message . com...
I have a very unusual problem with my power supply that I or noone
else can figure out. here goes;

My wife's computer-motherboard and power supply and cdrom stopped
working I assume some type of surge. I replaced her motherboard and
used a power supply from my computer and got her up and running. No
problems her computer started up right away.

I then bought a new power supply for my computer and installed it. No
problem light on M/B was on but computer would not start up. I tried
checking switch wires etc... and all connections no luck. I thought
maybe the power supply was defective. I even tried it into my wifes
computer and it did not work.

I then bought a new power supply and the same thing happened, it got
power but would not start. I tried it in both computers and no luck.

I then switched the power supply from my wifes computer(my original)
and my computer started right up.

To sum it up, my original supply works in both my computer and my
wifes. I then tried 2 new supplies which did not work in either
computers.

Any help would be appreciated. I am lost.


Thanks,


Mike