My Broken Sega Monaco GP Cabinet

Bought this from ebay a few years ago, they said it was working, but when I got there they said there was a minor fault that it wouldn't accept credits. Well I got it any way. Still can't get it to accept credits so haven't tested the gameplay. Also when I got it originally it had most of the scenery just with a couple of bad sprites. But now as you can see the sides are a blur, don't know why this is but it has been in the garage for a couple of years. Hoping to find an expert who can help me fix this. :)

Видео My Broken Sega Monaco GP Cabinet канала SicCoyote