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Leaky capacitor causing reboots?

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Name: Mattwizz3 (by mattwizz3)
Date: November 15, 2006 at 17:05:12 Pacific
OS: N/A
CPU/Ram: Cel 1GHz, 128Mb
Product: Custom..
Comment:

Hey people, you might remember that a while agao I was given a computer that kept restarting no matter what I tried. Recently I pulled out that motherboard again because I was given a 128Mb 9250 and I wanted to test it out, so I grabbed some spare parts and put together a system and of course I get reboots. But I noticed something this time: a puffed out leaky capacitor near the CPU. Could this be the problem? its a normal 1000uF capacitor so it should be fine to replace.
Is it fine to just solder a new capacitor to it? Or am I going to run into problems with other things melting off?

Thanks

Mattwizz3 : )

Sempron 2600+ @ 2.2GHz
1Gb DDR400
Asus A7N8X-E Deluxe
200GB SATA
2X 80Gb IDE
256Mb MSI 6800 Ultra



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Response Number 1
Name: DAVEINCAPS
Date: November 15, 2006 at 17:19:27 Pacific
Reply:

If you're reasonably good at soldering I'd go ahead and replace it. Remove the board and use something like desoldering braid to remove the old solder and capacitor. Then solder in the new one. It's probably electrolytic so make sure you get the polarity right.


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Response Number 2
Name: jboy
Date: November 15, 2006 at 17:30:13 Pacific
Reply:

Badcaps forums - they have some helpful FAQs etc.

If I know the answer I'll tell you the answer, and if I don't, I'll just respond, cleverly

--Donald Rumsfeld


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Response Number 3
Name: Mattwizz3 (by mattwizz3)
Date: November 15, 2006 at 20:11:42 Pacific
Reply:

Ok, thanks guys. I went and baught the capacitor and have now solderd it in. Thanks for your help. I've got it to boot to 98SE, and doing a Prime 95 test on it. How long should I test it for and are there any other tests I can run on this to check stability? Its been running prime for 10 mins now which is a record, probably the longest its run without a reboot.

Mattwizz3 : )


Sempron 2600+ @ 2.2GHz
1Gb DDR400
Asus A7N8X-E Deluxe
200GB SATA
2X 80Gb IDE
256Mb MSI 6800 Ultra


0

Response Number 4
Name: SkipCox
Date: November 15, 2006 at 21:43:29 Pacific
Reply:

overnight Matt...treat is like memtest.

Skip


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Response Number 5
Name: OtheHill
Date: November 16, 2006 at 08:22:21 Pacific
Reply:

If one cap was leaking then chances are more of at least the same size will also go. I would keep an eye on this. I had severe data corruption on a machine with bad capacitors. I didn't know about the issue with bad electrolyte in MANY caps until the computer would no longer boot. By that time there were three bad ones. FYI there was at least one MBoard recall (Abit) because of this issue. It was an industry wide problem at the time. Bad, incomplete, stolen electrolyte formula was the cause.


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Response Number 6
Name: jboy
Date: November 16, 2006 at 15:53:27 Pacific
Reply:

Wiki has a decent treatment of the subject - caps can fail for reasons unrelated to the industrial espionage 'incident' - the symptoms of failure are quite variable, but a bad capacitor is unmistakable

If I know the answer I'll tell you the answer, and if I don't, I'll just respond, cleverly

--Donald Rumsfeld


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Response Number 7
Name: Mattwizz3 (by mattwizz3)
Date: November 16, 2006 at 16:28:17 Pacific
Reply:

Yeah well I was given the computer origanly because the power supply blew out (I'm guessing this destroyed the capacitor) and when they replaced the PSU it kept rebooting. It was a 6.3V capacitor so I'm pretty sure a PSU blowout could have killed it, I replaced it with a 1000uF 16V capacitor so it should work nicely. I've had it running for over 12 hours without a problem and origanly it wouldent last 5 minutes. I'm fairly confident its good for now. Thanks for all your help guys.

Mattwizz3 : )

Sempron 2600+ @ 2.2GHz
1Gb DDR400
Asus A7N8X-E Deluxe
200GB SATA
2X 80Gb IDE
256Mb MSI 6800 Ultra


0

Response Number 8
Name: jboy
Date: November 16, 2006 at 18:44:19 Pacific
Reply:

The two events may or may not be related (although it shouldn't hurt to use a higher voltage component)

Glad to hear you've gotten it working

If I know the answer I'll tell you the answer, and if I don't, I'll just respond, cleverly

--Donald Rumsfeld


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Response Number 9
Name: mcduffbr
Date: November 28, 2006 at 05:34:22 Pacific
Reply:

Does anyone have a solution to remove the sludge from leaky capactiors. I've got a few on an old K7V-100 that ran down the board and gummed up some other components.


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Response Number 10
Name: OtheHill
Date: November 28, 2006 at 06:04:34 Pacific
Reply:

Try lacquer thinner. Seems to cut most anything without harming.


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