does the drive light flash twice when you turn on the wii? Maybe bootmii boot2 is installed and it jut didn't work before
If that doesn't work, priiloader doesn't work, and savemiifrii doesn't work...the only other thing that I know of is that you'll have to send it to somebody to get reprogrammed. I personally don't know how to do this. They're about 4 or so people on here that do though. But they'll need your wii to be older to have boot2 installed or a nand backup I believe (correct me if I'm wrong).
Somebody else may have another idea though.