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PSU dead....then alive

S

Stinger836

Gawd
Joined
Apr 20, 2003
Messages
928
Last night my parents Compaq 5020 stopped working. Imagine the PSU dying and thats basically what is was like no matter what the tower wouldn't turn on. Then on the back of the psu I switched the little red thing to 30V and it actually turned on but the HDD didnt spin up. So when I switched it back and turned it on it came on. How could this have brought it back to life just switching it from 30V->15V?
 
I don't know the answer to your question, but you may want to buy a new psu before that one dies and takes the whole machine with it. :eek:
 
I've got 2 theories:

1. The Voltage input selector switch was marginal between the two, causing a problem, and by moving it back and forth you reset it to it's correct position for your location

or, more plausably

2. There was some situation in your computer that caused the PSU to go into "I'm going to wait for this to clear up before I start and probably need to be unpluged to be reset or I won't do anything". It's common after a short for PSUs to do that, so by changing the selector, and then changing it back, you gave it enough time to reset or perhaps because if it's a good PSU it won't allow you to provide it the wrong settings on that switch, cutting off power if the wrong one is selected, which would have much the same effect as unplugging the PSU.
 
I did unplug it but i tried it with 15V again before I had switched it and the PSU shutoff about 4 hours before I got to the computer to fix it.
 
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