APM only arms with USB connected

I recently had a hardware issue with my APM2.6 and discovered the power Zener had blown so I replaced it.

Now when I arm the APM with just the flight battery, the motors spin up then stop and it disarms.

If I try with the USB connected, then it works OK but obviously I cannot fly with the laptop hanging underneath :-)

Any suggestions of where to look?  I would guess at it being a PSU issue...

Thanks in anticipation,

Jim an Kent.

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Activity

Neville Rodrigues liked Neville Rodrigues's profile
Jun 30
Santiago Perez liked Santiago Perez's profile
Jun 21
More…