SY-41CL lock up current drain

[Ángel Martin]

(12-15-2016 07:38 PM)JurgenRo Wrote:  Inadvertently I've tried to plugging a non existent Rom Image. The machine locked and showed @s in the Display. I removed batteries and let the machine sit on my shelf without batteries for full 2 month in hope to drain the current from the board that way. Today I inserted the batteries again and ... the 41CL is still locked up, same behaviour as before.
Before I'm going to disassemble the machine in order to get the current from RAM, I'd like to ask if anybody out there has some some experience about the time needed to get all of the current off the board (in this case: V4-board).
Thx, Juergen

Not sure if this is myth or has a scientific ground, but one thing that has helped with this issue at times was to plug the serial connector (with the batteries OUT !!). This may have been coincidentally to other actions, sure enough Monte's description above sounds a better approach.