I have the same problem I once connected my BH 503 to my cell and just as I connected I received a call like instant and it got disconnected automatically but after that it never turned on neither it flashed a red light while charging. More Dilemma I went to fix the head phones but even after 2days of suspect-ion it gave negative results They changed the battery and all the ports except motherboard but it didn't work so just had to go home disappointed. Final Conclusion: NEVER HAVE YOUR HOPES ON NOKIA U MAY GET UR CASH BURNED IN FRONTA UR EYES