Power problem – APM 2.x will not power up

07/14/16

Problem – APM 2.8 will not power up via power module but will power up normally with USB cable from PC in Mision Planner.

After I tried to add a buzzer to my APM (ordinary HobbyKing buzzer) via the ground and signal pins #6 on the long 16 pin rail (analog input pins) – now my APM will not power up except by USB and PC.

What did I brake?

Piezo Buzzer for KK2 KK2.1 & Naze32 Flight Control Boards (1pc)

http://www.hobbyking.com/hobbyking/store/__47014__Piezo_Buzzer_for_KK2_KK2_1_Naze32_Flight_Control_Boards_1pc_.html

I tried a spare power module from my Pixhawk – same problem.

I checked voltages on power module 6 leads – same in both power modules -

5.05, 5.05, 3.9, 4.5, 0, 0

Did I burn out internal fuse?

Help,

Vince