More Power Supply Problems?

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depawl

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Joined
Oct 13, 2001
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157
I'm building an Athlon system (Athlon 900, ECS K7S5A MB, 256 M SDRAM, ATI 32M video) and everything went pretty smoothly 'till I tried to power it up and nothing happened. No fan, no PS running, no nothing. I searched several posts on this and other forums and have tried the following:
- jumpered the power-on header on the MB
- checked all jumper settings and connections
- removed the board and PS from the case and tried to power it up that way
- tested voltages from the PS
- cleared the CMOS jumper.

None of these made any difference. The only possible problem appeared to be the PS. when I jumpered pin 14 to 15 it would run, as would the case fan which I had connected to it. However, when I checked the output voltages (both with the PS plugged into the MB and unplugged) the only pins that registered were
pins 14 (3.3 v) and pin 9 (5 v). Is this normal or not? Will the other pins only register a voltage once the system is powered up?
If the PS is ok, any other ideas on what it could be or other troubleshooting I could try?
Thanks in advance and merry xmas.
 
Joined
Jul 29, 2001
Messages
21,334
Definately not normal. There should also be a 12V source. Here's what should be there:

 
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