missing intermediate roller #17 icon in one body (#6). SM 74-6 (1999)

A few days ago the operator of a Heidelberg SM 74-6 from 1999 told me that a button disappeared from the panel, I imagine it could be activated and deactivated somewhere in the menu but I don't know where. Could you tell me where I can activate it again?

 

That would typically mean that the directional control valve solenoid has failed the plausibility test on INIT, whether that is from failure of the solenoid or simply a bad connection in the circuit path.

 

A good answer from junker , try to test with another solenoid valve ,