Please Help: Wii not playing any games at all

Alright, so i got this jap wii console which is able to play us games and backup games. i am not sure why cause the seller did not mentioned anything about a mod. so anyways, i have been playing games smoothly until recently, where new games are not playable anymore.
So me trying to be a smartass, updated to 4.0J, thinking that thats the solution to my probelm, however instead, it worsens and now and cant play anymore games, the games show up in the channel screen, however, when i click it, they gave an error in jap, i think it is asking me to read the wii instructions manual blah blah....and also, when i use gecko region free, it just hangs at the loading game screen this happens for all the games ( backups mainly)
i tried many ways to solve this, including downgrading, changing region and even buying the lens cleaner but to no avail.
So any help?? i hope i can play wii again

edit//

nevermind, i had posted instructions for changing the system language. however the Japanese version do not have this option.

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Last edited by troy512; 03-07-2009 at 20:22.

do you know if you have a mod chip, or is this just soft modded?

are you only wanting to play original and backup disc, or do you play VC, WiiWare games?