I will try to make this as detailed as possible.
I have a Western Digital My Book 500GB (Essentials 2.0 edition).
It has a power cable and a USB mini plug only.
While trying to insert the USB mini plug earlier today I encountered some resistance, which subsequently gave way as I heard a snap. When I opened up the enclosure, I found that the usb min adapter thingie, popped off the green silicon breadboard, micro-chip thing. I apologize for the lack of electronics vocabulary.
Anyway, I see 3 possible solutions here.
1) I could either solder it back on (which I am not going to do).
2) I could by another adapter peice (entire green board).
3) Buy a a new external HD but i would lose my data.
I really want try and purchase a new adapter peice (#2) but I have no idea what to call the peice or even where to go.
I am incuding some photos and if you want I have more, just ask or PM me.