hi there. this is the closest thread i could find to what happened to my US Wii. hope you dont mind that i post my wii problems here too. This also happened to me, installed the ios60 patch & uninstalled, then fully bricked and even GC controller won't work.
I believe i have a vulnerable boot1 as i bought my wii last august 2008, US version, 4.1U, with bootmii as IOS, preloader installed. I made a nand backup using the bootmii before.
is there anyway my wii can be salvage without buying a new mobo? thanks.