Hi! I have a DR-40 turning off when i try to use an external mic. The device simply turns off. In the "Rec Mode" menu, when I select the "Dual mode", "Overdub", "4 channels" or change the Source to "Ext Mic" (Mono or Stereo) the DR40 turns off (with a clicking sound too). The device is recording normally with the internal mics, but with this problem i can't use any external mic! It doesn't matter if the "Ext in" key is in the Line, Mic or Mic+Phantom position. It doesn't matter if a mic is plugged in or not. After a hard search, the only thing I found was a video on youtube showing exactly the same problem. I will share to make easy to understand what are happening! I will be very glad for any solutions or any kind of suggestion! Thank you!