Corvette
Bally, 1994Suddenly this Corvette doesn't start when pressing the start button.
Button is working in test mode.
Credits are there.
The WPC-S chip was replaced with a pico programmed one months ago but it was working up to now.
What could it be?
Here's the video irl
The game won't start if the machine has a malfunction like "I can't see any balls".
Open the coin door, press the service button (furthest from the door, maybe press twice), and read what the error messages say.
If you had lost your battery settings (and game had gone off free play), I'd expect it to take two credits to start a game. If somehow your programming was changed, or scrambled (VERY RARE), there is a "factory setting" under Utilities. The game will complain after you factory reset it that time and date aren't set... that's also in Utilities.
There may be other things that the game knows "If this isn't working, there is no point starting a game". So check your error messages, check that the game knows that it has balls.
Let us know what you find.
Common problems here include: Ribbon cables that need to be unplugged and plugged back in (with power off). Big square chip on the CPU needs to be pressed firmly with your thumb (with power off). Fuses blown (this usually will allow you to start a game, but won't kick a ball out). Opto board for switches having a bad 100uf 35v capacitor and the opto switches malfunctioning. Broken wires to critical coils that don't allow a ball to clear, and the game needs that coil to work.
Lots of things, but finding out if you have any error messages is the first thing to look at.
Ok, I was back on this today and figured out exactly what was causing it.
First checking if all balls are present and they were. Ball through registering all (anyway this machine reports if at least one ball is missing).
I put 20 credits and it didn't start the game.
I had batteries removed before I stopped using it for a while so there were no errors.
Factory reset therefore didn't help.
Replugging the cables and pushing cpu in didn't help.
Then I put in the batteries to see if there will be any errors after reboot and the game was able to start!
It suddenly works!
To pinpoint missing batteries were really the issue I removed the batteries again, booted in factory settings, set the time, put some credits and it couldn't start a game! Aha, got it!!
Then I put in the batteries and the game can be again started with 1 credit as expected.
All WPC machines I had were able to start a game without batteries until this one.
Maybe someone will be able to tell why but I'm happy this is resolved and hopefully it will help anyone with the same problem in the future.
Thanks for all the tips guys!!!
Quoted from ALY:All WPC machines I had were able to start a game without batteries until this one.
Keep an eye on your machine over the next few months.
This seems like one of those things that you think you've got it fixed but the problem comes back...
Glad you got it fixed, but this is pretty strange!
Quoted from ALY:All WPC machines I had were able to start a game without batteries until this one.
And that is the case.
Something else changed collaterally when you added/removed the batteries.
--
Chris Hibler - CARGPB #31
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Elkhorn, WI