Big Guns
Williams, 1987Hi all,
I just purchased my first pinball machine - Big Guns- and the display hasn’t worked at all, I ordered a new pinside display board and still nothing. There is a green light near the display test button on the board when the game is on. Any thoughts on what I should try next? I appreciate your time, thanks!
0BA656D7-B6F0-4020-964D-9280ED895C64 (resized).jpegQuoted from Bigguns1:Any thoughts on what I should try next?
Do you have a voltmeter?
Quoted from Bigguns1:Thank you guys so much for your input! How do I know what fuse to check or which connector is the power supply to the scoreboard?
I would, but by no means that I'm a expert at this, Unplug the machine and check all fuses for continuity. Carefully and gently unplug and reinstall all connectors one at a time. Don't disconnect by using the wires.
Quoted from Jappie:Does the machine itself work? Does it make a 'bong' tone when you turn it on?
The machine does work however I do have to press the diagnostics button on the main board with the coin door open after I turn the switch on in order to have full functionality every time we play.
Any thoughts on what I can do to not have to do that each time? I really appreciate all the advice!
I'll assume that your pin is booting because you say only 1 display is out. First off do this with the machine turned off open the head up and disconnect the display and swap it with one you saw light. Start the machine and see if the display you know was good is now lit, if so it's not the connector. Now look at the display you know didn't work to see if it is now lit, if so we know it's not the display. This may save you ordering displays you might not need, and answer our question, display or connector
Tell us what you find
Quoted from Williampinball:Yea just check all fuses with unplugged the machine ,and check for lose wires and connectors
Quoted from RWH:Tell us what you find
So actually none of the 4 displays were working so I bought a whole new pinscore board with displays and it still doesn’t work, I guess that would narrow it down to connectors or fuses, I disconnected all connectors and reconnected them carefully one at a time on the main board and still same problem. I’m thinking I’ll test the fuses and if that’s not it I can replace connectors.
Also the new pinscore display board has a light on so I know there’s power to the board, maybe it’s a connector issue, does anyone know which connector would send the data to the display board, I’m thinking that may need to be replaced? Thanks!
Oh it's an all in one piece. Well as I said I don't have that pin but I'd bet the problem is on that display board, but what caused it is likely downstream and I can't help with that, you need someone familiar with the pinscore board and other boards in the system. Someone will help out you can count on it. Sorry I couldn't be of more assistance to you.
the pinscore displays have a test button. When you push it what happens? If all power is good they will run through their self test sequence eliminating it as a source of trouble.
Can you use a DMM? If so what does your power supply read at the test points? If your ribbon cable is bad it will cause all sorts of funny things but until your display does the self test its looking like a power issue.
Quoted from Phat_Jay:Dmm digital multi meter[quoted image]
Ok yep I have one I’ll check it out
You have power supply issues for sure or problem with wiring or connectors. Test power supply voltages first. As for getting readings, set to dc volts and ground the black lead to cabinet ground strap and test the power supply at the test points. pinwiki has pictures and procedures for you.
Report back your voltages.
should be an easy fix.
Quoted from Bigguns1:Looks like the ribbon cable was backwards! It isn’t marked on the board which side is pin 1. Thanks so much for all your help guys!
I thought that might be it ,I had that years ago ,great you found out now
Happy flipping
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