Black screen loading backups on system with wiikey2 + softmod
I've got a PAL 3.4 Wii with a Wiikey2. Until recently, it's been fine with most backups I could throw at it. A month or so ago, I installed Homebrew Channel hoping to get it to play DVDs and movie files through the various media centres. That didn't work, but the bigger problem is that now almost no backup games will work on the system - they show up, but then go to a black screen.
I just tried following the "Dummies Guide to Softmodding"; all appeared to be OK, the Backup Launcher application was installed, etc, but I still get a black screen. I've tried installing the IOS56 WADs, etc, as required by the games I'm trying, but still no luck!
Any suggestions? I'm thinking it might be necessary to try to undo all the homebrews, WADS, etc, to get the Wii back to a "Virgin" state, but I'm a little unclear about how to do this.