They will release back down if you're in the middle of a booster multiball. The game will remember them as a virtual locked ball though.

If this isn't what's occurring and they're not staying up there when you're not on a booster multiball, then you may need to jiggle the connector a little under the guitar head lock area itself.

I think the connector under those locks can get a little loose and cause that issue. Especially if it worked before, and if it’s not during booster multiball.

It sounded like the ball lock issue was happening before they went to beta, and is still maybe occurring after that. Pretty certain it’s the connector underneath if it’s not due to happening while on booster multiball.

Good catch, I totally forgot about it releasing balls from powerchord lock when it times out.

I think you’d see it in switch error.

Double check to make sure you’re not in booster multiball when trying to lock and also you’d have to have at least 1 member to be qualified before you can lock. 6 members qualified to lock all 6. If no members are qualified, it shouldn’t hold a ball up there, just like it shouldn’t hold a ball during booster multiball. Hope this helps.

Most likely the record needs tightened if it wobbles. The larger plastic nut is more for raising or lowering it so it sits flush with the playfield.

There is a small 1/4” screw head on the bottom under the playfield. And another small Phillips under the record label. It’s possible to press super hard on top of the record to hold that Phillips and then use 1/4 bit driver for the screw on the bottom to tighten it so you don’t have to puncture the label but it’s difficult and may work loose again. I sort of press that with my thumb while wedging my fingers around the post the ball hits to get my leverage or hold it steadier.

I did it that way for a long time but I finally just punctured my label recently to get it tighter, for longer.

I pull the playfield to service position, then get under with the bit driver and get it on that nut. You can get in there from the side with the bit driver in one hand while you hold the record from the top.