Wouldn't this technology have been developed when the show was on ABC?
Theoretically the light box control could have been, but when they showed the control box in GSN's Michael Larson special, it had the same design as other CBS control boxes of the time.
I'd be curious, also because of the heat, considering there was at least one camera behind the board.
Two cameras, if I'm not mistaken -- one for the close-up of the spinning contestant and one for the wide shot of all three scores/close-up of the other contestant during the final spin.
It hadn't occurred to me until GSN started airing the show again -- "Press Your Luck" had six cameras, which I think is more than the average game show of that time had. And two of them were useless during the Q&A rounds.