This is my first post and i would greatly appreciate any help. There are no repair facilities in my area for pinball machines.I am not a pinball machine tech. What I am is a dad of twin girls who ask, daddy can you fix our pinball. I do have a general knowledge of electronics and can follow a schematic. I have checked what i can check with what information I could find online. I have a Spring Break Machine, Ive had it for a few years. It was turned off for a while, when turned back on it would not boot..I had no display when i turned it back on, all that lit up was the lights in the playing field. I removed and re-soldered the main chip on the mpu, no change. I checked the voltage at the 12 to 5 volt power supply. The voltage was low, I repaired the board and got the power back to a steady 5 volts. My display lights up now and goes through the paces of high scores and the name of the machine across the display and all 4 score displays light up. It has a button installed for free game play. When you push the button it gives you the games and shows them on the display and the dog barks showing the free game button has been pushed. When you push the button to play the game the display zeros out and is ready for score. This is where the game stops functioning properly. It will continue to try and bring the ball out in the launch area but the solenoid at the end of the shoot does not retract to allow the ball into the launch area. If you manually retract the solenoid and allow the ball to pass on through it is launched into the play field but the flippers don't work and it will not score if something is hit. Also when the ball rolls back into the shoot it is immediately launched back out to the solenoid without pushing the flipper to release the ball. If anyone could lead me to a possible problem I would greatly appreciate it.

I did check the fuses with a meter, but i will check them again, I believe like you said that these circuits are connected, thank you for the response and the bump

does the led on the sound and play board suppose to flash

Can no one help me with this problem. I would really like to fix this pinball machine. I have searched the web for any information trying to fix it. I have done all the mods that i can find to try to resolve the problem. I hate to just start ordering parts without any idea what i need. Please if you can help me i would greatly appreciate it
thanks

actually i do not have all the balls in the trough. i took them out when i had the ground problem and was testing with only one. I have a manual on system 80b that is generic to all system 80,80a,and 80b systems. I will install the balls and try again. thank you for the information. I also found out in one of the threads i read that there is suppose to be a 5 second delay before the display lights. I dont have that, it lights up as soon as the power is turned on.

I put the balls in the trough and you were right. I never would have thought of that. Now it continues to want to play multiball, it keeps shooting balls into the play area. I did the self test and it says that switch 31 is closed, i know that is the switch in the launching area. I checked it and it looks ok. I am going to check it again i think that might be the problem with it now.
thank you very much for your reply,I had decided to just start ordering chips and boards until i fixed it. Obviously that would not have helped. I will update as soon as i find out.
thank you

Here it is a fully functioning machine!! after fixing the ground issue(doing the mod at the transformer) obviously fixed my main display problem.(the reason i started working on it)Then trying to test with only one ball in the chute creating issues with switches. Finally finding the 2 switches bent "up" keeping all 4 balls from going into final chute area and the second switch making it difficult for the ball to roll on into the launch area. After straightening out these switches finally fully functioning pinball machine.
Thank you so much for helping me. It seems like its always the simple things, but can be so hard without a little information.

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yes you did and i appreciate it. I did look and there wasnt any obstructions there. I didnt realize the switches were bent up, not knowing what they were actually suppose to look like threw me off. I'm learning,lol, a lot of reading, help from a few people who knew more than me with information i couldnt find on the internet helped me to repair this machine.
thank you so much for taking the time to message me.