Ok I have an issue. Occasionally I've had the problem where my wii would be working fine, I'm playing games etc and I turn it off. Later when I go back to play more it sees the bootmii menus fine but when I try to go into system menu, or hbc channel I get a blackscreen/no signal error from my television. Now before this has happened maybe 2-3 times and I just restored my nand and everything worked again. Well last night I turned it on to yet again the same problem, but this time I restored the nand I had always used and nothing, same problem persist. I've now tried the method in the original post and when I boot my wii my television gets a unsupported mode error. The tv supports everything but 1080p so I'm not sure where to go from here. Also the wii does turn on using the wii mote. Anyone got a suggestion?
USA Launch Wii
System Menu 4.2 (but the times before when it happened on diff system menus)