Does the wiimote power the wii on, NO?
Plug your gc-controller into port4, remove disk and sd-card- hold all 4 directions on the d-pad down at the sametime, keep holding, push the power button. Do you see a black screen with 3.4u? You my need to try a few times.
If your wiimote does not turn on the wii, and you see 3.4u with savemiifrii- you bluetooth module is likely the culprit. Open the wii and try to reseat the blue tooth module, it is above the sd slot. If that fails, buy a new one- $10