After several crashes, the Volantex P-40 has intermittent battery connectivity. When I plug in the battery, sometimes it activates the gyro and the controls work, then it loses connectivity.I can't see inside to figure out what is going wrong. Is it a possible short/loose wire, or id the board going bad? Is the only alternative to cut it open? And if a bad board, are there replacements? TIA --Bruce Sharer