Hello everyone, I have just recieved an APM 2.5 with the ublox and pm module. Every thing is hooked up and communications thru 3DR radio shows up on the Flight planner. When it comes to arming the motors beep rapidly . Having checked and rechecked available resources ie manual, groups and so on I do not see a problem similar to mine. What I have done so far is manually calibrated ESC's and auto to follow to no avail. Radio calibration shows good PWM output mode is in Stabilize, simple mode is not engaged.

My question is, is it possible that there is no signal out put from the APM? is there a way to graph or see if there is any output. Should I check the diode next to the fuse for problems.

Any thoughts would greatly be appreciated.

Thanks Aubrey.