Do you have anything installed that could alter the way your Wii boots up? I remember my WiiOS dump not working at all because I had preboot installed (causes a hang on an actual Wii so that you can get in the preboot menu by pressing reset during loading). If you do, all you need to do is reinstall the Wii Menu (just the wii menu is necessary) of your firmware version using a WAD (google is your friend, but I found that this was the easiest method). But I recommend for a clean start, you find a way to get to 4.00 with the Homebrew Channel (you wont have any penalties as far as I'm aware - because this is what I have). Just make sure you find a guide that allows you to carry the Homebrew Channel with you on your way to 4.00 (I want to link to a guide but it's probably illegal in a way). After that, you can try redumping your WiiOS again and see if it works.
Note, you can't do a lot yet. So personally for me, it's not worth it unless you have the PAL version of the OS. If you have the PAL version, you could probably boot ISOs within the WiiOS and have them work, but asaik, NTSC games don't boot.
Note, you can't do a lot yet. So personally for me, it's not worth it unless you have the PAL version of the OS. If you have the PAL version, you could probably boot ISOs within the WiiOS and have them work, but asaik, NTSC games don't boot.