cant get tony hawk wii skateboard to power on, changed batteries, held power on for over 5 seconds, worked yesterday....
Try to re-mod your WII
http://www.askwiki.net/How-to-Mod-a...
It can help although I am new to Wii as well and don't know all the tricks yet. This one helped me though last time I was having a problem, so just test the water and see what's gonna happen.