Some (admittedly very hazy) memories of trying out for first season of syndicated J! in 1984...
Tryouts were held at Metromedia Square in Hollywood, which was where it taped at that time. There were between 25 and 30 of us trying out that day, all seated at classroom-style chairs in a large room. As we were waiting to get going, the fellow next to me leaned over and asked, "So is Art Fleming still hosting?" (This will not end well, I remember thinking.) Of course, the first question the production assistant asked was, "So who hasn't seen our show yet?" About three people — including the guy next to me — raised their hands. They were immediately excused and told to go home, watch the show and come back after they'd done so.
The first part of the process was a paper-and-pencil test of about 30 general knowledge-type questions, of which you had to get a particular percentage (around 80%) correct to make it to the contestant interviews. I thought the questions were fairly easy, aligning with their "trivia with a twist" tagline of the first season. I remember being stumped by a question about the building that's on the back of the $10 bill but managed to get enough right to go on to the contestant interview. Six of us made it through that part of the testing process.
The interviews were pretty low-key; typical questions about your work, hobbies, etc., to get a feel for your personality. There were two people interviewing; I think one of them may have been Dick Schneider, the director. Then we ran through some sample questions to see how quickly and how well we could respond to the game board. If I recall correctly, this was pretty low-tech; I think they were just typical J! categories on a board; they read the answers and we raised our hands to buzz in. We definitely didn't run through a complete game.
Three of us made it through that part of the process and were told we would go in the contestant pool for a future taping. I was called over to the interviewers' desk and reminded that, since I lived in Seattle, I would have to pay my own way back to be on the show. Was I willing to do that? Knowing that they wanted out-of-town contestants, I responded that I would. They told me that if I did come back, they'd guarantee me a contestant spot on taping day. (I'm sure I wasn't the only one they made that offer to; a guy who was on the episode before mine came down to LA from British Columbia, so I assume they were giving priority to nonlocals.)
All in all, the procedure took a couple of hours, and a confirmation letter came a few days later.