03-16-2013 12:52 PM
Hi and Welcome to the Community!
Please try this sequence...note that, throughout the entire 4h15m process, your BB must remain connected to a known-good wall charger (not PC USB):
This has been known to "kick start" some BBs.
It is also possible that your battery or BB has experienced a problem...to test, this sequence is needed:
The results of this will indicate if it's your BB or your battery that has the problem. Note please that "new" and "known good" are not necessarily the same...while rare, a new battery certainly can be defective. The best method is to find someone with an identical BB that does not have problems, and trade batteries -- see what happens on both.
Good luck and let us know!