Bad Caps - PCChips 805LR

KachiWachi · Posted: Tue Sep 25, 2007 12:27 pm Post subject: Bad Caps - PCChips 805LR

I just got one of these from a friend (they complained it "smoked").

When I opened the thing up, I found that it has bad caps (CPU VRM).

Can I assume that if I replace the caps, the thing will work...or will I find more problems down the road?

Thanks.
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CPU - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), i430VX, 128MB EDO.
BIOS patched by BiosMan (Jan Steunebrink).

edwin · Posted: Tue Sep 25, 2007 9:21 pm Post subject:

Usually replacing the caps will do the trick. Sometimes it's not actually the caps but the VRM itself that is the problem (and will bulge the caps due to overvoltage).
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edwin/evasive

Do not assume anything

System error, strike any user to continue...

KachiWachi · Posted: Wed Sep 26, 2007 5:00 pm Post subject:

All I know is that there are "tented" caps all over the place. Some have black stuff coming out of the top.

When I get some free time, I'll look closer.

Thanks.
_________________
CPU - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), i430VX, 128MB EDO.
BIOS patched by BiosMan (Jan Steunebrink).

cp · Posted: Wed Sep 26, 2007 6:32 pm Post subject:

if the caps are bad replacing them will fix the problem. well, mostly...the problem is: if the caps are bad the cpu will demand the current directly from the mosfet drivers which are not designed to work under this condition. so if there was smoke coming out of the case it could be the caps going bad or the mosfet drivers dying. you can check the mosfet drivers for shorts as a start. if they are shorted they need to be replaced (don't forget to replace the caps!).

KachiWachi · Posted: Thu Sep 27, 2007 12:19 pm Post subject:

OK.

Thanks cp. Smile

_________________
CPU - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), i430VX, 128MB EDO.
BIOS patched by BiosMan (Jan Steunebrink).