Hello all I'm new to this website so if this topic has been brought up I am sorry.
I received a Bally s5500 from a friend that was not working when I got it. He said he didn't know what was wrong with it. I would turn on the machine and nothing would happen only the door lights would go on. So I did some searching on the internet and saw that it was a bad power supply possibly. So I purchased a power supply on ebay. When I got the power supply I put it in. The bill machine started blinking red and the lcd display showed f 83. So I thought progress. I shut the power off while I researched code f 83. Came back to the machine to do a (Soft?) reset turned on the power and nothing but the door light again. No blinking bill taker and no lcd display. But if I play with the wiring harness for the lcd display I can get 8's to display or 2's or jumbled stuff or it goes bright to dim to off to bright again. SO I am not sure where to go with it or if there is a short that killing the power supply. I saw in a post to test for power coming out of power supply but not sure how to check that. Could the main board be bad? Any advise would be appreciated.
Thank you