I recently picked up my first arcade game. A Lady Bug. The game wasn't working when I bought it and the guy had another board he bought off of Ebay and hadn't gotten around to installing which he gave me as part of the sale. I brought it home and found a bad power supply.
I Replaced the power supply and now the game fires right up. It will coin up and start playing. The problem is there are no sprites on screen. The game functions. If I move the stick, the dots start disappearing. The enemies aren't generating on screen either but they are also moving about the maze because they will eventually kill the Lady Bug.
I have taken a cursory look at the board and don't know where to start. I was following some other non-Lady Bug threads chasing down sprite problems and found a link to a site with the mame drivers for various games. I looked at the Lady Bug one and it seems that Eprom 1 and 2 deal with the character and sprites. The chips don't look visibly damaged. I don't see any corrosion on the pins.
I'm thinking about buying an Eprom writer, but the models that support the brand of 2732s on this board are in the $100+ range. Before I drop that kind of money, I would like to be sure the Eproms are my issue.
Does anyone have any ideas what might be causing the sprites not to appear on screen?
I Replaced the power supply and now the game fires right up. It will coin up and start playing. The problem is there are no sprites on screen. The game functions. If I move the stick, the dots start disappearing. The enemies aren't generating on screen either but they are also moving about the maze because they will eventually kill the Lady Bug.
I have taken a cursory look at the board and don't know where to start. I was following some other non-Lady Bug threads chasing down sprite problems and found a link to a site with the mame drivers for various games. I looked at the Lady Bug one and it seems that Eprom 1 and 2 deal with the character and sprites. The chips don't look visibly damaged. I don't see any corrosion on the pins.
I'm thinking about buying an Eprom writer, but the models that support the brand of 2732s on this board are in the $100+ range. Before I drop that kind of money, I would like to be sure the Eproms are my issue.
Does anyone have any ideas what might be causing the sprites not to appear on screen?

