Samsung heat pump dryer drum seized?

[speccy]

Our heat pump dryer is only a few years old. However this morning I heard an ominous grumbling sound like a drive belt jumping and the drum had stopped.
I tried to start it again and could just hear a humming I guess of motor trying to turn.

Removed all laundry and the drum feels really stiff to turn with the squeaking noises. Something feels jammed or a bearing is seized maybe? Any ideas of how to diagnose?

 

[speccy]

Just to update here for anyone wondering if i fixed it.

I took the back panel off which covers the drum drivebelt and exposes the fan bottom left driven by the main motor. I turned that by hand as it seemed to be seized, this free'd up the rotation of the drum. Refitted it all fire up the tumble dryer been fine ever since!