Am i screwed???

This is a continuation of a post that originally started in:
WHATS THE TRUTH??? THREAD BUT SINCE IT IS REALLY A NEW PROBLEM I THOUGHT I SHOULD START A NEW THREAD:

OK MAJOR PROBLEM....I go and try to play my wii this morning load the usb and get a blank black screen. My 16 year old daughter informs me that it happenned after she UPDATED THE WII AT 3am when it propted her too. DAMMIT!! Ive only had it 2 days!! OK, she didnt know but that is neither here nor there....I am now at 4.2 firmware. AM I SCREWED?
All other apps work(snes, gen.) but the usb loader doesnt. I do have a backup nand file...do I use that? I do not want to touch anything until i get some EXPERT advice.

If it's a new Wii then your backup NAND is not much use as it is extrememly dangerous to use bootmii/IOS.

4.2 can be hacked although I still think it's better not to have 4.2 http://www.wiihacks.com/recommended-...tem-menus.html You'll need to reinstater cIOS to get your USB loader to work again.

Since my homebrew channel works do I just start at Part B... or should I downgrade?

Thanks Tealc got it fixed!