Jumper is black screen
did the 4.2 messie soft mod-- all other games (except GH5) run fine -
Jumper is a black screen when run from USB HDD backup.
Black screen usually means you're missing the ios you need, or it's out of date. Click the ios link in my sig, look at tealc's guide as to which ios's games use, then ensure you have that installed.
4.2 has all the ioses so not much to look for there. what region is the wii and what region are you trying to play?
Ah, missed the 4.2 part. I saw black screen and locked on.