How to program cost on snack machine

[troy]

I bought one cheap snack vending machine, 17 selections.
It does not have any manufacture name on it.
It has a coinco for receiving quarter and a PC board with number 0-9, and a window display. Some selections already have price set. On Back of the pc board, there is a red square button (I believe for programming). I try different ways to set the price for different selections, but failed.
The seller either forgot or does not know how to program it.

Any advice for me.

Thanks

[Howard]

Without a brand name, it will be difficult to solve your problem.
However, if you have time on your hands:

1. Push the red button. This should set the machine into the programmable mode. (usually it will turn itself off after about five minutes, noticeable by a "beep" sound and/or the display returning to aa attraction mode message).
2. Try some different initial buttons to create an action:
For example, hit "5" and then A-1. If the price blinks, try setting a new price and then enter the "#" sign. If a candy spills out instead, you have found
force vend".

Keep going for a w hile. If you can establish two or three numercial codes, one of us probably has the same machine and can list the code sequences for you.