1. Wipe and load the OS fresh to the eBay BB...
How do I wipe the BlackBerry using Jl Cmder? - BlackBerryFAQ
and maybe
What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ
On the other 8310, pull the battery on the BB (while powered on) replace and reboot. If that continues (playing the Media Player from the top button) I don't know. It should not.