Hi! First of all, thanks for this wonderful forum, I've already used badcaps.net to fix my lcd screen psu and find it very usefull overall to up my knowledge of diy electronic repair!
Ok, so I have this file server right, an old p4 computer with 2 hard drives and a shitty vid card, that blew something just yesterday. Smelled funny and all... the computer would not power up at all after that event (no wonder). So, opened the psu and the fuse was blown, but everything else seemed fine, except 2 bulged caps (not too much anyway) on the final circuit, the one near the output wires. Tried a new power supply (55w true power trio), and voila, the computer powered back up and well. Problem solved, right?
Hell no... the mainboard shows heavy caps damage, which I don't really fully understand, so see attached picture of the board in it's current state. 3 Caps are clearly bad, all KZG (united chemicon?) 820uF 6.3v 105c.
Looking back at the power supply board, nothing seemed to have "exploded" the way I heard it when it happened, but on the mainboard, one cap is really messed up, with electrolytic juice sprayed all over and the rubber sleeve popped (C6G1), which seemed like the "exploding" culprit.
Now to the question: I know I need to change the defective caps on the mainboard, but which caps do I also need to change at the same time, so everything will work in the long run? (24/7/365 with very little load)
I'm guessing I need to at least change all 820uF 6.3V caps, (total of 5) but should I change the 16v 1200 uF's, or even more caps, knowing that the psu blew a fuse and is probably dead now? (I don't want to even test it further, was a 350w antec, SL350). Or should I change the whole mainboard because the board probably blew the psu? I'm confused as to how to be sure everything will be ok..
Thanks!!!!
Ok, so I have this file server right, an old p4 computer with 2 hard drives and a shitty vid card, that blew something just yesterday. Smelled funny and all... the computer would not power up at all after that event (no wonder). So, opened the psu and the fuse was blown, but everything else seemed fine, except 2 bulged caps (not too much anyway) on the final circuit, the one near the output wires. Tried a new power supply (55w true power trio), and voila, the computer powered back up and well. Problem solved, right?
Hell no... the mainboard shows heavy caps damage, which I don't really fully understand, so see attached picture of the board in it's current state. 3 Caps are clearly bad, all KZG (united chemicon?) 820uF 6.3v 105c.
Looking back at the power supply board, nothing seemed to have "exploded" the way I heard it when it happened, but on the mainboard, one cap is really messed up, with electrolytic juice sprayed all over and the rubber sleeve popped (C6G1), which seemed like the "exploding" culprit.
Now to the question: I know I need to change the defective caps on the mainboard, but which caps do I also need to change at the same time, so everything will work in the long run? (24/7/365 with very little load)
I'm guessing I need to at least change all 820uF 6.3V caps, (total of 5) but should I change the 16v 1200 uF's, or even more caps, knowing that the psu blew a fuse and is probably dead now? (I don't want to even test it further, was a 350w antec, SL350). Or should I change the whole mainboard because the board probably blew the psu? I'm confused as to how to be sure everything will be ok..
Thanks!!!!
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