I've had my wii for about two years, it's been softmodded for about a year. It's on 4.2u. I've tried gecko, neo gamma, and other different launchers but none of them worked. At one time or another i installed cioscorp, it worked fine but now NONE of my games play.
It's not an issue with the physical wii
I'm not to sure about what IOS are needed to play games, whether that is backup or retail. The disk channel just shows a question mark when i load any game.
[spoiler=Click here for useful links]Softmod any Wii guide Yes ANY Wii!!!
FAT32 Hard Drives - Formatting, Loading, Ripping, Playing (recommended USB setup)
Ultimate List of Troublesome Games & Solutions
The Noob's Guide To Getting Help
How to Run & Post a System Check
Blackscreens & Freezes - Causes & Solutions[/spoiler]