Yep, after Jedi's (and others) comment...I'm rather certain it's Drock. Good call.
Took the glass off when it acted up after first turning on. Tried to manually get it to go away...which I did, but not certain when. Not the drop targets, not the "?" target, not any obvious roll-over switches or the captive balls...seemed to be around the back somewhere. But not sure due to the likeliness of going thru multi optos or switches. Will try again Monday.
MT45 - thank you for the link - I'll check that out. I'm rather interested figuring out the history of Dredd.
Thanks to all that chimed in, much appreciated!