my directv dvr 15 receiver recently was freezing and ultimately crashed. Upon recommendation by a friend I followed online instructions and simply swap hard drives instead of replacing the whole unit. Today I swapped the hard drives and my powering up issues still remain. Upon plugin power into the back of the R 15 the power and record lights additionally come on and sporadically flash. After five to ten seconds of the flashing the lights go off and the receiver falls into a ticking pattern. Both power lights and record lite faintly blink while ticking noise comes from the DVR. Any suggestions on what my issue might be.?I read that the R 15 will automatically reformat the new hard drive I replace this morning. Is this correct or do I need to do a PC format first? Thanks for the help!