As it sounds like a brick of a sort, moved to the bricked section. You may wish to elaborate, like NSMB or SMG2. Whether you had BootMii installed when this happened and if as boot2 or IOS. I'm guessing most likely no, but still have to ask. Also would be helpful to know if you followed a wiihacks softmodding guide (betting not). Did you have Priiloader installed? You mention black screen, but then go on to say you still had access of a sort --- this is confusing.