You can try, but it probably will not work. You need to have a dip patched system ios or a modchip and a trucha patched system ios for this to work. You also need a gc controller to do savemiifrii. Could you load backup game dvds from the wii disc channel? Are you loading priiloader properly? Holding reset and turning on the wii while holding reset? Did you possibly remove priiloader by installing a system menu? The wii can be fixed, but you may have to buy some needed supplies, like a modchip, possibly a compatible dvd drive or some drive emulation like a wode, a gc controller, some blank dvd's.
If you have the needed patches on your system ios, a compatible wii dvd drive, and a gc controller, you can fix it.
Also if you don't have any patches on your system ios, there are other methods, but those also require the modchip, etc.