**Moved to correct section for Brick Issues**
So you have bootmii/boot2 installed, that's good.
What System Menu is your Wii at right now?
What did you do to your Wii before it went to Black screen?
Can you switch the Wii on from Red led to Green led with the Wiimote power button?
Do you have cIOS installed?
Do you have cIOSCORP installed?
What was the name of the popular 1960s Sci-Fi show created by Gene Roddenberry?