What region? What happens when the wii boots?
You can try 2 things
1- Put a disc in with a 4.3update and see if it updates anything
2- Make a game iso, patch it to autoboot with bootme. See if you can load a game. The game must be in the region of the wii, unscrubbed.
If you can boot a game, you can fix the wii.
Post back with the missing info and your findings and we will get your wii fixed.