Power Supply Ground

[dsundquist]

So i was helping my friend install a new motherboard, and it wouldn't work. When i took it apart though i noticed his power supply was missing the white cable on the motherboard connection. The white cable is the ground cable. How can I fix his power supply and not be forced to buy a new one?

Thanks!

ps. its clearly his power supply not his motherboard, because it works fine with my power supply.

 

[mi1ez]

Black is ground. The white cable is -5v.

-5V became optional in ATX spec 1.2 (Jan '02) and was completely removed in ATX 2.01 (June '04)

Couldn't say what's wrong with his power supply. what make and power is it, and what PC is it trying to power. Did it work before the mobo change? Have you double checked all cables and RAM, CPU etc.?

 

[dsundquist]

Yeah his other motherboard worked.. except his cmos battery was dying constantly. He has the old motherboard in there and the power supply is working with it. We have narrowed it down to the power supply swapping every part out with a known working part. Hes trying to power an amd 7750 (black edition 64 dual core 2.7 ghz). Is there away to replace this missing cable?

 

[Onus]

The cable is not "missing." It is essentially obsolete. What brand and model of PSU is it? What brand and model is each mobo?

 

[dsundquist]

Mobo is an MSI K9A2 CF (Am2 / Am2+) the Power supply is an Antec true power 2 550 watts, (and no white cable ).

 

[Onus]

Is that the new mobo or the old one? If both, then it could be the new one is simply bad; it IS after all, MSI.

 

[dsundquist]

Thats the new one, and it works perfectly fine with MY power supply, not my friends.

 

[jsc]

Thats the new one, and it works perfectly fine with MY power supply, not my friends.

Basic troubleshooting - if a motherboard works with one PSU but not another, the freaking PSU is bad.

And it's not because of the "missing" white wire. Black wires are the ground wires.

 

[dsundquist]

Help, can i fix this problem?

 

[cjl]

Yes. Get a new PSU.

 

[AKM880]

+ 1, buy another one. Preferrably Corsair or PC Power & Cooling

 

[Onus]

Or Antec. You can get an Earthwatts 430 for $55 now, with no rebate games.

 

[knotknut]

Sell your Power Supply to your friend....Problem Solved.
Anything Else?

 

[TheDraac]

Here's some good information about all the power supply wires.

http://www.playtool.com/pages/psuconnectors/connectors.html

Read and learn.... and bookmark it too...