On my Gottlieb Buck Rogers the vari-target resets properly most of the time, but sometimes during a game or at game start up it fails to reset the varitarget and I get a message "check lamp P17 stuck switch". I have a Pascal board in the game.

What kind of switch is it sensing is stuck? A mechanical switch like a contact switch or is it a digital signal switch on a board? Or would the playfield transistor be sensed as a switch in this case. How many switches would it check?

I have cleaned,adjusted and checked all the mechanical switches on the varitarget, the solenoid works good, and I have checked the control board edge connectors but something else is erratic.
I assume the varitarget rivet contacts are not considered switches in this case, or are the numbered bulbs?

I'm an EM guy and sometimes have trouble understanding SS problems.
Thanks.
Alan