No INS backends available

when i try to initiate my connection to my apm planner or tower the connection connects and terminates within 5 secs. And also when i try to run the AccelGyroMag value is always 0.

Init APM:Copter V3.3 (340970fc)

Free RAM: 4096
FW Ver: 120

load_all took 56us
0 0 0 � Q}�MPU9250: unexpected WHOAMI 0x0
AK8963: Could not configure bus for AK8963
No Compass backends available
�3�Calibrating barometer_R� Q� No INS backends available
�3�barometer calibration completeo��3�GROUND STARTt

Help me solve this please


Do other examples work for you?

Yes , GPS,Barometer and LED are working correctly…


It looks like your MPU9250 is faulty, please send me a private message with your order number and we will arrange a replacement board for you.

I have sent an private message to you with order number please send me the replacement ASAP… Thanks in advance