I have an M11 with Spektrum mod. used it last Sunday and it was fine. I tried turning it on today and it will not turn on. Completely dead, no blue light, nothing on the screen. Tried everything from changing batteries, checking connections, played with the switch nothing. This is my second M11 that had this same problem. The first one had a very similar problem, one minute it was working fine, then i unplug the lipo batt. to charge it, after charging plugged it back to the radio, turned the switch on and nothing. Btw, these are used radios when i bought it, but what are the odds on having the same problems. Any suggestions will be much appreciated. Thanks.