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Thread ID: 130921 2013-04-20 08:56:00 PSU Dilemma linw (53) Press F1
Post ID Timestamp Content User
1337727 2013-04-20 08:56:00 Logic is failing me on this one . Son's Dell Dimension 5750 had a PSU (Silverstone 500W) upgrade a couple of years ago when he got a beefier graphics card . A couple of days ago the machine failed to power up . Mobo LED lights up, front power LED blinks orange, fan doesn't run - no kick at startup, either .

Unplugged all cables, grounded pwr good lead and the PSU fired up fine . All voltages were there .

Removed all plugged items from mobo and connected PSU up again and got same result as above .

Subbed in two other PSUs and they powered up and ran the Dell machine fine .

Put the Silverstone PSU into wife's PC and it runs fine! WTF?

This has me wondering what to do next as my powers of logic have run into a dead end . Maybe I swap wife's PSU with son's and all will work again!

Any ideas?
linw (53)
1337728 2013-04-20 11:34:00 The mobo pulls down the pwr good line on the old PSUs but not for the Silverstone. My wife's mobo can pull down the pwr good.

I suspect the mobo is the guilty party so my son might have a good excuse to buy a new comp! Certainly a new comp and new PSU will fix it!
linw (53)
1337729 2013-04-20 12:25:00 Dells usually have four diagnostic lights on the back. Which are on and which are off? Chilling_Silence (9)
1337730 2013-04-20 22:02:00 Thanks, Chill, but this model saved money on that feature! The original PSU cables are as short as possible and as few as possible. Even had to add a power extension to reach the HDD. Bloody cheapskates.

Have rooted out the graphics card and have put the original PSU back in so at least it runs and he can get a new comp in slow time. The C: drive is an old 80GB IDE job so that is as slow as all get out.

Definitely time to move on!
linw (53)
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