SY-41CL lock up current drain

[JurgenRo]

Finally, I tried all oft the suggested procedures: stand alone, in combination and with various parameters (e.g.duration time of pressing the ON-button). Alas, nothing helped, the machine ist still locked up and it does not respond to the Shift 4 with a beep either. The only difference is that once in a while the „lock-diplay“ changed from all @s to something like 7???,,??....

By the way, I forgot to tell that the machine has got a new IO-block Flex PCB replacement (another great item from Diego!). Don’t know if this might have some influence?

Thank you again for your help!
Juergen