APM 2.6 accelerometer and Gyro no data in mission planner

I have been using my APM 2.6 for a while now. however a major problem has now arisen. Gyros and Accelerometer are not sending any data to mission planner therefore I cannot re-calibrate the accelerometer the live data shows nothing happening even when I wave it about in the air! Any help would be greatly appreciated!

Thanks

Tom

@carter10,
Please provide tlogs and/or data flash logs to help troubleshoot your issue.
The APM 3.3vdc regulator may have failed.
Regards,
TCIII GM