OK so ahope tried what I sent him with zero result.
So where we are behind the scenes in discussions with Siglent.
This has been escalated to the product manager and technicians and they are checking possible scenarios.
There is suspicion of an analog board problem, yes of course and I have some ideas of just what.
Now it's Sat at the factory so we won't get a reply until Mon (your Sun).
2 immediate possibilities in my mind; damage to relay contacts or one of the shunts.
Thoughtful testing should easily confirm.
One suspects the over-current/blown fuse event caused this...........but it shouldn't have !
The 10A FB rear panel fuse should open first......not the 12A SB on the PCB.
ahope, make another post or 2 to get your count above 5 so full member privileges become available.