need more info... seriously, u gave a terrible description...
r u turning it on and getting a blackscreen immediately?
do u have priiloader installed?
did u try putting an sd card in ur wii with the bootmii folder+files and seeing if it starts bootmii? Seriously, u think u may have bootmii installed, well this is how u check if its installed as boot2... like, wtf man, u obviously know about bootmii, and u r asking for help b4 even trying to use it (if u even have it).... I have nothing more constructive to say at the moment *bites tongue*