#1: battery holder is either loose or corroded causing it to no longer make contact. Or your batteries are in wrong. Test with a dmm.

For other errors, use switch test to clear them. The CPU only knows about switches so all errors come from switches that are either stuck or don't trigger.

You'll have to check with a meter if battery power is getting onto the CPU, the pads holding the battery may be bad.

Go to single switch test and stop on the switch with the error and hit the start button.

Otherwise you may have to do a factory reset to clear the errors. You will lose high scores and adjustments doing this.

LTG

2. Switch #36 Catapult (FT); in test report, I can't clear, but catapult works fine.

The catapult will still work on FT even if the switch doesn't work, because the game knows the switch isn't working. My buddy had this problem, and although the catapult did fire it took a little longer than normal. Replace or fix the switch.

Must be something in the air - my TAF did that to me today when I powered it up for a game, reset things, powered down and up a couple times and all is good. Hopefully a badly seated battery just got vibrated, if it happens again will dig in and see whats up.