CPU Connector fried at plug on MoBo, chances my MoBo still works??

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knotworking

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Nov 1, 2015
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Hi everybody-

I'm looking for a little advice. A PC I built years ago for my parents came back to me yesterday, they said they couldn't get the machine to do anything, no post screen, nothing. I confirmed their issue, no beeps but all fans came on (case & CPU); went to unplug the PSU connectors to test the PSU and found the 4-Pin CPU connector was stuck in the MoBo; got it out with a little force and saw that 2 of the 4 pins were swollen & charred. It's a pretty cheap PSU and old board (Gigabyte GA-MA78GM with an AMD Athlon 64 X2 6400+ CPU).

I'm trying to figure out what I need to buy to get this PC back in service asap, I figure a new PSU is obvious. There does not appear to be any damage to the board (no swollen transistors , the 2 pins inside the 4 pin connection are charred black, but they are intact and the housing is fine. My thinking is I need to clean those two pins somehow and see if a new PSU fixes everything, but I'm wondering if this board is just toast and I should not waste the money. I can get dual-core refurb PCs for ~$100 these days, is it worth buying a PSU, then maybe a MoBo, then also possibly a CPU??

Any tips, tricks, or relevant stories are appreciated!

Jacob
 
Solution
K
Updating this for anyone down the road that might have a similar problem.

While I was waiting for the new PSU to arrive, I found a Power Supply Tester tool I've had forever, figured I'd use it to see what the old PSU might tell me. Since the 4-Pin CPU connector pins were fried, I took the 6-Pin PCI-E connector on the PSU, carefully separated the 4 pins that matched the CPU connector from the other 2 pins (with a utility blade and a fair amount of force), cut the now 4 pin connector off the PCI cables, and then spliced it with the 4 pin CPU cables. Once connected, the tester tells me there's no juice coming from the PSU to the CPU, whatever happened caused the CPU module (or whatever it's called) on the PSU to fry completely.

New PSU...
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cin19

cin19

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Mar 14, 2011
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found the 4-Pin CPU connector was stuck in the MoBo; got it out with a little force and saw that 2 of the 4 pins were swollen & charred.
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I believe the MB is gone something like that, the PC component got fried. If you can get the cheaper dual-core refurb PCs, why not. Think about this, even you buy the new MB, you need the new OS, it will cost about $100, and new PSU too.
 
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K

knotworking

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Nov 1, 2015
4
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4,520
Thank you for the feedback cin19. I already ordered a decent PSU that was on sale with a big rebate for $25 (never hurts to have an extra PSU handy), I was thinking I would plug it into the MoBo when it arrives and see if it boots. Do you think I'm running a risk of damaging the new PSU (or anything else) by doing that?
 
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K

knotworking

Reputable
Nov 1, 2015
4
0
4,520
Updating this for anyone down the road that might have a similar problem.

While I was waiting for the new PSU to arrive, I found a Power Supply Tester tool I've had forever, figured I'd use it to see what the old PSU might tell me. Since the 4-Pin CPU connector pins were fried, I took the 6-Pin PCI-E connector on the PSU, carefully separated the 4 pins that matched the CPU connector from the other 2 pins (with a utility blade and a fair amount of force), cut the now 4 pin connector off the PCI cables, and then spliced it with the 4 pin CPU cables. Once connected, the tester tells me there's no juice coming from the PSU to the CPU, whatever happened caused the CPU module (or whatever it's called) on the PSU to fry completely.

New PSU gets here, so I pull the mobo out of the case, hook it up with the PSU, low and behold, everything fires up!! I've been running it for several days, everything seems fine. I noticed on the back of the mobo, right behind the CPU connector, the board has gone from green to a burnt-yellow green. I'm hoping the old PSU (which was reaaaally cheap) started pushing excessive amounts of juice to the CPU over some amount of time until it fried itself. Of course, it could be the other way around, I might have just given the mobo a new PSU to fry. Time will tell, but at this point I'm thinking I just fixed their computer and it only cost $25 (as long as I remember to mail-in the PSU rebate)!
 
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