Hello has anyone solved which component needs to be replaced. I replaced the 5Ghz wireless module 2878d-wina2, and was not able to get it to work, but the module i used was purchased used and may also be defective. All of my reading up on the chipsets tells me that this is the wifi module meant for the video streaming. I believe its the correct module, however the console behaves the same way with either wifi module disconnected. Its hard to find wii-u repair information.
Same problem, get an error has occured when pressing the sync button twice, and no connection to the wii-u gamepad. Since i get the same error just by pressing the button twice, I suspect its a problem in the console and not the wifi chip in the controller itself. Since I should be able to get the sync pattern on screen in order to sync a new controller, but it can't even do that.