I do remember one episode with Leland Yung as solo champion, where a lightbulb went out on the gameboard. Instead of stopping tape or going to a commercial, they decided to continue on with the game...
Quote source: gameshowutopia.com
Bill: Oh, you see what's happened? A bulb has burned out on our board. That hexagon is supposed to be red, so you folks at home, if you have any red crayons, get them out and fill in that black space on your screen, and if you don't have crayons, kids, get Mommy's lipstick or Mommy's nail polish.
(After the round) Okay, now the round is over and they're fixing the board and you folks at home see a red blob on me from where you used Mommy's nail polish, so we'll take a commercial while you rub it off with Daddy's wristwatch.
-Dan