Hit the Ice.
This game was plagued with multiple issues. The first one being p3 and p4's inputs were all stuck-on. This made the game impossible to play, because as soon as you inserted a coin p3 or p4 would immediately "press start" with its stuck buttons, and then you wouldn't be able to control anything. Thanks to gamez fan for reporting this bug.
After fixing that, I did a few test plays and noticed that the skate-marks on the ice never cleared.. Not even on the titlescreen/attract mode! (see piccys below) [MAME is exactly the same way] After doing some debugging I found a simple test to know when the skate-marks buffer needs to be cleared, and now the game is perfectly playable. There is one last little issue - the character selection screen is skewed over 5pixels or so, but I think the original pcb most likely did this too, because everything else in the game lines up perfectly, except for that screen. Unfortunately I don't know anyone with this pcb and also can't find a video on the web to test this theory.
best regards,
- dink