Well it's 100% semi-bricked.
If you have GeckoOS then it's been softmodded at some time although as you didn't mention the Homebrew channel it seems like it was removed.
I would recommend trying out some of the unbrick tutorials for semi-bricks and see how you get on.
If you want to know which modchip it is:-
Pop the Wii open and check visually for the modchip.
Manually burn every firmware update disc for every modchip and try them till you get lucky.
If you wish to install homebrew again:-
As you can't access system settings you will have difficulty running bannerbomb so you might need to use Twilight hack or Super Smash hack.
Check for bootmii/boot2:
Turn on your Wii and check for 2 disc bay blue flashes in close succession (i.e. 1 second)
Check for preloader:
Hold down reset, power on while still holding reset.
So we can help further come back with your findings.