Did I damage my Pokemon Emerald copy when changing the battery? The game works, but I noticed an error with the font. Some pixels seem to be missing. The sound is also unclean as you can hear on the attached audio. In wild battles there was no winning music. When removing the bottom contact from the original battery, I might have touched the area below the battery (red rectangle) with my knife and pliers. Is it possible that this could cause this kind of damage? I just bought it on ebay and am not sure whether the damage was present before. The copy is very very likely legit btw.
https://vocaroo.com/1hJkcg3y8rQB 