Bulging capacitor causing freeze problem? [pix]

skeedo

Senior member
Nov 29, 2004
269
0
76
I'm putting together a PC for a friend. Everything has gone well except for the freezes. The monitor goes black, but the monitor power light is still on (and not flashing) as well as the computer. Keyboard lights are frozen. Have to reboot machine.

Thing is, the freezes only seem to be happening when copying a large .iso from my other computer through my network. Full test of 3dmark ran fine. Downloaded various programs and drivers from the internet that have installed fine. CPU does run a little hot with stock cooler but copying a file shouldn't generate nearly as much heat a 3Dmark test.

Low and behold looking in the case, I found a bulging capacitor directly behind the ethernet ports:

a5jj4h.jpg

25hd5dt.jpg


Even though the pix might not show it, it seems to be pretty bulged. I have tried practically everything else. Tested memory, tried different videocard. I don't believe it's the PSU because it's a Rosewill and not very old, although I can't eliminate that as a cause.

What gets me is the eeriness of the freeze. No BSOD, no errors in event viewer, or no indication as to what might be the cause, this is why I believe it may be the capacitor. Motherboard LEDs always read FF no matter what.

System:
EVGA 680i motherboard w/ Wolfdale e8500
4x1GB Corsair XMS2 DDR 800
EVGA 8800GTS/ MSI 8800 GTS
500GB WD SATA HD
Win XP SP3
Rosewill 600W psu
Realtek onboard NIC w/ nForce drivers

I did buy the system off of craigslist for a fairly good price, minus the hard drive. It's possible I got juped because the guy couldn't fix the problem and decided to just dump it on someone else.....:p
 

RebateMonger

Elite Member
Dec 24, 2005
11,586
0
0
Bulging or leaking capacitors on a motherboard can cause:

a) no effect at all
b) freezes
c) reboots
d) failure to boot, especially when motherboard is cold

I've seen all of those.
 

notposting

Diamond Member
Jul 22, 2005
3,498
33
91
Replace the cap. Pretty easy to do if you are halfway handy and motivated. Caps are cheap also. PM me if you have questions about it.
 

notposting

Diamond Member
Jul 22, 2005
3,498
33
91
To follow up on my post from yesterday, if you have experience soldering and a decent amount of soldering equipment already you are good to go.

the cap king and badcaps both have good info and sell caps. I've used the cap king so far and been happy with the caps and prices. Salvaged a couple boards this way (one we use daily for our HTPC).

And let me tell you, when you get that thing fixed up and fire it up the first time, you feel like quite the stud :D
 

bruceb

Diamond Member
Aug 20, 2004
8,874
111
106
I agree, the cap is your problem. I would either replace them all (the electrolytics) or not fix the board. You already have 1 bad one and likely the same defective batch was used on the entire board. So the others failing is just a matter of when.
 

RebateMonger

Elite Member
Dec 24, 2005
11,586
0
0
You can read more about failing capacitors and repairs at http://badcaps.net.

The next model in that EVGA series, the 780i, used solid capacitors. If you end up relacing the board, you might look for one of those rather than a 680i.
 
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