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Old 04-09-2016, 02:50 PM
darklife's Avatar
darklife darklife is offline
Modulating Madness
Join Date: Jan 2010
Location: Wisconsin, USA
Posts: 48
Question 80s arcade gambling machine issue

Sorry no pics or model number at the moment.

I am going to be taking a look at a floor arcade machine for a friend to see if I can get it running.
I do have a background in digital electronics and know my way around the scope and such.

When turning on the machine it makes a loud musical tone that is stuck along with all random ASCII characters on the screen that flicker or stay stuck in the same pattern.

I tried resettling all the socketed chips and looked over the main board for any obvious issues and pressing the momentary toggle reset switch but even after that it still continues to be stuck in this condition when powering up.

Is there any obvious parts I should be looking to test on the board?
Just wondering what the general diagnostic overlook would be to get started on this?
There is some eprom chips that I wonder if they could go bad with age?
The biggest problem is the stupid main board is inside the same slot area as the coin mechanism and there is very little slack on the cables so testing/repairing it is going to be a PITA.
Also the board was just hanging in there by its cabling which I found odd. It seemed to be this way from the get go.

Thanks for any tips and ideas to get started
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