Chosen Solution

What can I do to fix this?

Double check the wires that is ok and completely ok without worn or damage on it. Try to reset the adapter using this link http://en-americas-support.nintendo.com/… If nothing work you can try to ask in a local repair center to diagnose what is burned inside the wii board. That might be a coil or in the worst case have GPU damage an need to replace the GPU chip…. You must have special machine to replace this chip ….