Lately my Xbee Pro failed during a mission with my Hexa jdrones Arducopter V2.5.3
After the mission, when i tried to connect my APMv1.4 with the 5v power coming out of the Power distribution board, the APM didn't powered on. On removing and closely examining the APM board from sparkfun i noticed that the trace got fried that connected GND on the IN5 pin on the APM. I inserted a jumper and when i connected again with the power from PDB, it powered ON.
I reloaded the firmware V 2.5.3. The problem now is that THE RADIO CALIBRATION IS SHOWING ALL THE BARS (ROLL, PITCH,YAW, THROTTLE, RADIOS 5,6,7,8) BLANK.
Furthermore i noticed that the ATMEL MEGA 328 is overheating on the sparkfun board.
Still problem's not solved. Thinking to RMA apmv1.4 to distributor. Another question which one for i should go now APMv1.4 or APM2?
Since the problem has not been diagnosed as yet, still intimidated by this all happening again :(
or should i just order ArduPilot Mega CPU board, 2560 CPU? by performing Test in CLI APM mission planner, all the tests are giving me values except pwm and radio that return all channel values 0 so i hope there is no problem with the IMU.
I have 3 boards exactly like this
I also have one that works fine.
It seems you have fried your MUX. Therefore, unless you can do SMU soldering, the board needs to be replaced. Good thing, modular design means you keep the same IMU (I have 4 red boards, but only one blue, the first one). So $65 damage. It's an expensive hobby :-(
PS. I use the old red boards to test stuff, like Xbees etc. That way, I don't endanger a new one by plugging in power the wrong way. So they are still useful. Also, each one is essentially a nice Arduino Mega board, and a nice USB/ serial board.
Ok i am consolidating all my observations again, for advices from the community, regarding should i rma the apm or troubleshoot it myself with some technicians available with me:
(a) A trace at IN5 on the ArduPilot Mega Flight controller board that connects to Ground got fried during an ArduCopter Hexa flight. This prevented the board to be powered by the ESC power, the board could only be powered by the USB. We applied a jumper to the fried trace.
(b) The area beneath the ATMEL MEGA 328 and Mux overheats.
(c) In the APM mission planner -> APM Setup (plane and quad) -> Radio Calibration, all the bars for Roll, pitch, throttle, yaw, radio5, radio6, radio7 and radio8 are BLANK irrespective of the RC transmitter response. I have tested the RC transmitter/ receiver with servos and they are performing OK. This problem started after the APM flight board trace got fried, before that it was performing ok.
(d) In terminal -> tests, all the tests are giving some values excluding radio and pwm, which give 0 value on all channels
(e) When i tried to program the ppm encoder as in http://code.google.com/p/ardupilot-mega/wiki/AVRStudio using "Automated procedure", all the leds i.e. yellow, blue and red leds are ON, But when i try to program it , it says that "Could not enter programming mode"