Faulty usb cable

I don’t know where my problem comes from, i am a newbie in HD from WD, but here’s the deal.

I bought a few weeks back a HD mybook 3.0, now it was working fine untill a few days back, it doesn’t work properly anymore. I use this HD for my WII. when i plug in the HD on the electric supply it’s working fine, coz i hear it running, but from the moment i plug the USB cable in it goes automaticlly out.

Can anyone tell me what can be the problem, I hav contacted WD already, they say to run some checking software but i’m not a big fan of doing this coz i don’t wanna loose any data.

Hope u all understand my problem little bit, coz my english not 100% :womanwink: