Like the above two replies, I suspect wires dislodged during inspection. You may also consider removing the AHRS box and "gently" turning it upside down, sideways, etc. I was experiencing anomalies and found screws & nuts had become loose inside the box. I only found this by the "rattling" noise when moving the AHRS box. I opened the box, secured all the hardware, has worked as advertised since then.