Video Game Repair/Monaco GP


I have a Monaco GP that starts up but when you start a game you get a line of yellow cars from the top of the screen to the bottom. I tried reseating all the chips but it still does it.

Gday Sean,


Your problem may be with a 74157 Quad 2-to-1 line chip on the board, failing causing the image to be rendered over and over again even though there is only one car actually on the screen.)  

Can't claim this answer as my knowledge as I found a similar problem, complete with youtube video which looks an awful like what you described.

Hope this helps


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I can answer questions on Arcade or Home Console repair or modification.


Repair, rewire, modification, rebuild, restore. (I repair numerous business and private arcade/pinball machines in my area of the state. I partner with a shop that stocks older console based systems and games, I am the one that repairs them back to working order.)

Have been building, customizing and repairing all types of arcade games since 2004. I have been repairing and modifying video games since the late 80's. (Most of my knowledge is self learnt and following others that have trailblazed in the industry.)

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