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Melted 24 pin harness PPC/OCZ PSU

post #1 of 12
Thread Starter 
I have an ASUS M5A97 R2.0 and a 750w PPC / OCZ (they bought them right?) power supply. I logged in via Logmein last night to check on something at home, the pc was acting funny, rebooted it and it never came back online. When I got home, only the fans connected to molex connectors would spin, so I unplugged the main 24 pin harness thinking maybe I need to reseat it / clear something off of it. This is what I found:








I never saw this happen before.. The pc was running without a case and there's air moving over everything. The pc was running under pretty high load for about a week straight. I'll have to find my original newegg information and see how old the PSU is, its gotta be at least 4 maybe 5 years old... I don't particularly trust this psu anymore...Not sure if the board is damaged, I hope not. The plastic that melted from this harness is now melted into the motherboard socket as you can see. Not sure how to get that out, I imagine the pins are actually coated in the plastic now from what I can see.


Any ideas on how that happened?
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post #2 of 12
Is that a 24-pin extension cable? The clear connector housing makes me think it is. Do a "pin-out" and find out the purpose of those two pins. This will put you on track to find out what went wrong.

EDIT: If the pins did not make a good electrical contact this could have caused the melted connector.

EDIT. I checked on a pin out and those appear to be two +12V connectors. The wires being yellow are good confirmation to this
Edited by PCCstudent - 5/26/13 at 11:36am
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post #3 of 12
Thread Starter 
One oin belongs to the main harness and one belongs to the additional 4 pin. Any ideas on how to clean up the motherboard socket?
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post #4 of 12
Quote:
Originally Posted by Mr.N00bLaR View Post

One oin belongs to the main harness and one belongs to the additional 4 pin. Any ideas on how to clean up the motherboard socket?

You are correct, they are pins 11 and 12. They provide extra cpu power. Have you pulled the main cpu power connector off and given it a look over?. Pick out the melted plastic with a small pick. More important is figuring out why this happened. You need to figure out why more than the designed amount of current flow happened. I would not trust the board or power supply if you got it back up running. Forget about a RMA from ASUS as they have really clamped down on melted pins and melted circuit tracks
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post #5 of 12
Thread Starter 
Ugh, hmm. Very strange. I was running a fx 6300 with 4 cores turned off at stock speed / voltage. Ill check the cpu power harness now.
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post #6 of 12
ouch
    
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post #7 of 12
Thread Starter 
Checked the 8 pin CPU connector, looks fine, no issues.
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post #8 of 12
Those two yellow +12V wires don't power the CPU because its power comes from a separate connector. I may be wrong, but I don't think the +12V from the 24-pin connector is used by anything on the motherboard but is just fed straight to the PCI and PCI-E slots. So was anything plugged into those slots that went in crooked? Or is there a video card shorted or didn't have its own power connector plugged in directly from the PSU?

You can clean off the crud with a jeweler's screwdriver, but try not to scrape too hard and remove the tin plating. For the same reason, don't use sandpaper.
post #9 of 12
Do you mean PCP&C ?
post #10 of 12
Thread Starter 
Quote:
Originally Posted by larymoencurly View Post

Those two yellow +12V wires don't power the CPU because its power comes from a separate connector. I may be wrong, but I don't think the +12V from the 24-pin connector is used by anything on the motherboard but is just fed straight to the PCI and PCI-E slots. So was anything plugged into those slots that went in crooked? Or is there a video card shorted or didn't have its own power connector plugged in directly from the PSU?

You can clean off the crud with a jeweler's screwdriver, but try not to scrape too hard and remove the tin plating. For the same reason, don't use sandpaper.

My GPUs were working fine until sometime Saturday, which is when I rebooted the PC and it didn't reboot. They all had power connected though. Thanks for the heads up on that, maybe my mother or girlfriend has one of these..I sure don't lol.
Quote:
Originally Posted by brasslad View Post

Do you mean PCP&C ?

Yeah, I forgot the abbreviation smile.gif
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