I am honest,I do not know.
Format/Reset your Wii in the current State...I do not know if this is really recomended.
You do not have BootMii as boot2 installed (not possible on your Wii).
And Priiloader is gone after Reset the Wii.If something goes wrong,you have not really Chances to get your Wii back to work.
Good News:
ModMii says on
your sysCheck,all is fine.Then it is so.
No need to update anything.Please excuse me,I am wrong with my Statement on IOS80.
But all that helps us not really.
Did you checked
@jeannotte´s Advise ? Can you try another Router or WiFi (mabye from a Friend ?)
I am very sorry,I do not have any more Options or Tips for you at the Moment.
Maybe
@XFlak has Ideas....
We only can hope some of the many experienced Wii Users here have any Ideas or can help you.
Thank you.