At various points in the 70's, NABET technicians staged walkouts at all three networks and a number of episodes of their game shows were taped with management personnel manning the cameras. Not really technical problems, but those shows were just barely broadcastable, because the managers weren't as skilled as the regular crews.
This was particularly apparent on an early 1972 ep of TPiR, which featured some horrible camera shots that occasionally looked blurry...Bob himself, upon seeing a tape of this ep via GSN some 25+ yrs later, called it an embarassment.
There was one ep of Face the Music where the score displays on the podium apparently disappeared between games 1 and 2...Ron even mentioned it on the air, saying "I'm going to be keeping track of your scores, because we had a little computer breakdown just now", which he did, recapping the scores every time a subject was guessed.
During one ep of the 80s Treasure Hunt, the big logo sign started to malfunction during the show, more letters going out as the ep went on until it was completely dimmed by the time Emile Autouri's segment rolled around.
During a Christmas-themed daytime FF in 1979 (as was mentioned in an earlier, unrelated thread), there was a computer problem, so Fast Money was played on cue cards that day, w/production assistants writing down the answers and points.
Chuck Donegan (The Illustrious "Chuckie Baby")