nikon4fun

Need help. I have an Net MD MZ-N707 model. I dropped it on the floor once and after that the unit could not record. When I pushed the record button, I saw the unit engaged in recording mode with Mic level jumping with sound input. But it's not recording, the display kept on falshing for 30 min with the meter stayed at 0. Unit playback function is ok by testing with different recorded tapes. One more thing that I noticed ... during resting, the unit has a hissing sound in regular interval like when you forward or backward tracks until battery drained out. Thanks in advance for all helps that I could get.