I recently replaced a non functioning upgrade board with a new one. Everything seems to be basically working now, GPS, gimbal control, safe mode, etc, but the motors won't start. Does anyone have any ideas? Is it possible I soldered it wrong? If so, how can I tell? I also upgraded the tx because i broke my existing one, I'm pretty sure I programmed it correctly, but I thought I'd mention it in case it is useful information. Everything seems to be correct in the NAZA-M software. Thanks for any help.