I can' fly because I need to caliberate the IMU. I can't get past the 4th. step when following the instructions exactly.
Have upgraded copter & RC. Tried many times and ways, with same resuls. Any sugestions please ?

4th step?  Can you be more specific?

Yes. In the 4th. step the picture and the instructions tell me to turn copter back to the top of the copter facing up. I do this and it says
something like caliberation in progress. There it stays and goes no further. I left it in step 4 for at least 1/2 hour to see if it would go
any further, it wouldn't. 2 more steps remain. I am almost bald by now.

Double check the position.

Also make sure your gimbal isn't vibrating in excess.

Mobilcams Posted at 2017-6-16 03:11
Also make sure your gimbal isn't vibrating in excess.

Help, no progress yet. Gimbal very steady and rechecking positions carefully.

fans7b1aca89 Posted at 2017-6-15 07:42
Yes. In the 4th. step the picture and the instructions tell me to turn copter back to the top of the copter facing up. I do this and it says
something like caliberation in progress. There it stays and goes no further. I left it in step 4 for at least 1/2 hour to see if it would go
any further, it wouldn't. 2 more steps remain. I am almost bald by now.

Have you tried resetting the unit to factory defaults via the Assistant 2 software and try again after the unit has cooled down? Did you notice this after updating firmware, or is this happening right out of the box?

DJI-Jamie Posted at 2017-6-16 12:15
Have you tried resetting the unit to factory defaults via the Assistant 2 software and try again after the unit has cooled down? Did you notice this after updating firmware, or is this happening right out of the box?

It happened after firm ware updates. I will try reset to factory defaults and try again. Will let you know.

fans7b1aca89 Posted at 2017-6-16 12:27
It happened after firm ware updates. I will try reset to factory defaults and try again. Will let you know.

Please keep me posted when you can.

DJI-Jamie Posted at 2017-6-16 12:40
Please keep me posted when you can.

Resetting to factory didn't help either. Impossible to get DJI via land line.

fans7b1aca89 Posted at 2017-6-16 13:03
Resetting to factory didn't help either. Impossible to get DJI via land line.

Since you noticed this after updating the firmware, try to downgrade and see if that allows for you to calibrate properly. Worse case, you may need to get into contact with Support for a potential repair service. If you're not able to call them, you can also email support.us@dji.com or use the live chat system via the bottom of the link below:

http://www.dji.com/support

You can also just get a RMA to send it in by filling out an online repair request below:

http://www.dji.com/service/repair

Thanks a lot. Boxed and sent to DJI. Pray for me.