Defective 3pin plug in FAN connector on mobo

The black wire should be ground, just run a trace from the fans black wire pin to any other ground, like one from a molex maybe
Or measure the fan and buy a replacement,
Moto

you can run the fan off a molex if you like, just get a 3pin to molex adapter...
the only issue is the cpu fan will then run at max speed all the time... which in most cases isnt a problem unless its particularly noisy.

also as you hubby is able to spot a dead connection its likely he knows how to use a soldering iron... get him to check the solder on the pin and retrace it back and soler any dry joints on the way that seem suspect...
dont use a soldering iron over 25w though as it will likely damage the board. this is potentially dangerous to your motherboard so do it at your own risk.

THANK YOU FOR THE INFO I WILL TRY DOING THAT.

hi guys i got the 3pin to 4pin adapter i connected it to the 4pin adapter and believe me i was stuck with the cpu fan in my hand did't know what to do. this is a real test of endurance. please Help.

The fan is not working even plugged into the Psu?
I would suspect that the fan is dead then,
Moto

the adapter came with a 3pin that cannot be plugged into cpu fan, it like putting 2 dummies to each other. i hope u understand what i am saying

http://www.ebay.co.uk/itm/Dual-M-F-Molex-4pin-2-x-3pin-...

is the type of adaptor you would want, the block from the cpu fan plugs onto the pins, and the molex block plugs into the molex from the Psu,
do you have a picture of the fan and adaptor we could see?
Moto

thank u so much. this is exactly what i should have gotten must have the male and female 3pin. will keep u posted about my progress.

No problem, Glad to help and I'll keep an eye out for updates  
Moto