Oven gets an F2 error while preheating, the oven can be reset by flipping the breaker off and back on and it will usually preheat fine after that, until the next time it preheats after being off for a while. I found a video about pulling the board and cleaning it with some electrical contact cleaner and tried that but it still gets the same error, usually when the preheat timer gets down to about 3 minutes.

What else can I check and how? Or is it a safe bet the board is bad?

Those are all 4 digit codes, this is just a 2 digit code of F2...I know what the code means, I just want to verify it isn't something else before spending $300 on a new control board.