[Misc] Samsung SCX-6xx5 series locks up to processing and does not make copies.

[DrMark504]

I've seen this many times. Problem disappears usually a few days later on return visit.
By the time I return it works

One case 6 months went by and machine started to work as they just used another machine and left the Samsung alone.
This machine is copier only. Not connected.
So it is not a pending job.
Do a HDD dump??
strange again.