Thread: Doa Psu?

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  1. An Ominous Coward
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    Doa Psu?


    I have an ATX form factor PSU - 300W - that I just got from some dude on eBay (cheap-o no-name for a relatively light-use PC).

    I hooked it up last night and switched it on, and it starts to power up for about a second - fans spin, lights flicker, then it shuts right off. Voltage is correct, and I know it's not under-powering the system because it's replacing a 250W PSU that I gave to someone else. The only hardware diff from then is an 8MB Savage vid card replacing a 32MB TNT2 that I also gave to the same person - son in theory it should probably need LESS power than before.

    Did I just get a bum unit?
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  3. Contributing User
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    Sounds like it.

    Check the fuse in the plug, if its not that then email the guy straight away. Perhaps it got damaged in the post?
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  5. An Ominous Coward
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    Bummer, man.

    Thanks Rendy, I'll see about getting it replaced then.
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    One way you can easily test a ATX PSU is to use a paper clip to jumper/short out pins 14 and 15 on the connector. Should be a green wire that you are looking at and that needs to be shorted to one of the black ones. That green wire is the switch for the PSU.
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  9. Capt'n
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    *sighs* I miss jumpers...only way to know that card is set to the proper address...
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    There is another posibility, if you have not already scraped the unit.

    I've had this exact same problem when I upgraded my mobo but kept the cpu, the problem was that the cpu was overheating because I had flaked off the dried out heatsink compound.

    one burnt finger and some of that silver compound in the syringe later My cpu is running cooler than ever...

    Just a thought..

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