Hello everyone! I have strange issue with my pinbot that is driving me crazy! When I power the game on everything will play great. After a while the left pop bumper will just stop working. I can go into diagnostics and it won't read the spoon switch but it will read the scoring switch if I manually trip it. I've checked everything related to the spoon switch as good as I can to my knowledge and it all seems to be ok. I've check the readings on q72 and q73 and they test ok. Continuity through every wire that has to do with the left pop tests ok. If I turn the game off for a couple. minutes and turn it back on, everything will work fine for a few games and eventually he left pop will stop working again. I've tried reflow ing solder on the board connectors and nothing seems to help.

I'm really stumped with the whole thing. Any help would be appreciated. Thanks!

Zr3 tested good. I went to test U45 pin 3 and it was reading about 1.7. I pushed on it (socketed?) and touched the skirt and it worked. I think I have a bad u45 chip.

Thank you for your help!!! Hopefully a replacement chip will fix it

Maybe I'll try to replace it first.

Had a chance to finally replace the chip. That did not help. Going to try to replace the socket

Alright. I finally got around to replacing the socket. It didn’t not help. But messing around with it for a bit, I noticed that if I flexed the board around the yellow relay, the pop bumper came back to life. I checked everything in that area for cold solder joints and everything seemed to be ok. No clue where to go from here.

When I get back home I’ll check it out

r106 and 107 seemed to look ok. didn't have a extra pair hands around to help me check voltages with the skirt down. but I did do a little test thing. Iusually before if I were to leave the game on, at first everything would work fine. after a little time, the pop bumper would go out. after I found out about "flexing" the board and having it work, I took ad wedged something in-between the board and the back box and left the game on for a few hours. I came home, gave it a play and everything was still working just fine. Now I guess just need to find where the broken connection is.

I reflows the solder earlier on them but I’ll try replacing them as well

Replaced header pins and connectors and still the same thing. If I pull out on the board it works fine.

Nope. Still never figured it out. It’s frustrating