Default Tablet not detected when connected via usb at all

I connect my tablet to my two laptops, one is win 8.1 and the other osx, neither shows any sign of knowing the tablet is connected at all.

it does not prompt me to instal any drivers, i dont see it in device manager though i could be missing it. definitely doesnt show up in file explorer as a drive. have tried switching from mtp to ptp and back again. I have no dea. The same cable when connected to the charger works fine, but no sign of life on a computer.

I'm trying to root it and get CM10 on there but this is stopping me in my tracks.

edit: i also just tried an older windows xp computer, no luck their either.
Blackberry 7130c -> Blackberry 8700c -> Blackberry Curve 8310 -> Blackberry Curve 8900 -> Blackberry Curve 9300 3g -> Blackberry Bold 9700 -> Galaxy S II Skyrocket -> Nexus 4 -> Nexus 5