Hardware Wii video output problem?

[naxil]

Hi people. I post an image for understand my problem... Is age i have this problem.. Idk if i mess it with firts homebrew in alpha stage or is my wii broken a littlebit
Look this strange vertical line is normal? Its happen only with blackscreen (probably wii shutdown pixel not need to write?)

 

[MrCokeacola]

Does it only happen with just one game? I had an old Wii that had graphical errors from over-heating before the GPU cooked itself.