Updated the NVR to the latest firmware, updated the PTZ to the latest firmware.
Same problem
After a reset / power off the cams starting to do the check and is stuck looking down making a horrible sound.
Watching the live view when this is happening it looks like something is holding the camera itself preventing to do the check.
after 3 minutes of horrible sounds, it stops doing this and I'm able to move it around again, so nothing is mechanically stuck.
and on the other hand if I unscrew it , put it on the table ( dome facing up ) it doesn't have this problem.
Weird.
I contacted Hikvision in the UK to check this out because these cams are a little bit to expensive !!
Also I have troubles at night with the IR.
At night one of the cams is going nuts like it does not know if it is day or night