I think I have cooked my second Ardupilot. It worked perfectly on the GUI. Then I fitted the power module and the backplane on the GPS. Now the GPS does not light up, the HUD says bad compass health and it will not arm. Help please !
After a fairly straightforward setup my APM flew but with a weird yaw rotation. While trying to fix that, a) I got Bad Gyro Health and b) after fixing that I lost the ability to arm/disarm.
The HUD display shows all clear but I have a relentless red