My Wii U is able to connect to my router perfectly fine. Even though the signal is rather weak, I always get a successful connection test and can use the internetn browser. However, the big problem is that I cannot access any of the online services, such as the Miiverse, eShop, etc, and I cannot do system updates. Usually I get an error code in the 102 or 105 series.The only way I can update is if I put the console in my room (where it's much closer to the router) and use my gamepad as a screen.
The check for online services on startup usually says they're unavailable, and it shows the orange background behinf my mii's head. However, it'll sometimes show the blue background, indicating the online services are available. However, no matter when I try to connect to them, the connection fails. My Wii never had a problem using online services with this signal strength. Do the Wii U online services require a very strong connection?
This is very strange, as the internet connection tests still succeed.