Famicom - Snow Bros. Vertical Lines

[mtshark7]

Hey,

I just got a copy of Snow Bros. for the Famicom and it has vertical lines throughout the game!

 

I took it apart and reflow soldered the chips and I found one leg that had corrosion on it so I cleaned it with contact cleaner and put solder on that leg hoping that would help. I also cleaned the game entirely and checked all of the traces and it still shows vertical lines.

 

I know it's not my console or my famicom converter cos all my other famicom games work perfectly.

 

Would anyone know what could be the problem or how to fix it?

I looked online and all I get is how to fix the console and that isn't the issue.

 

Thanks!

-Mark