Hi there 
I just bought i brand new Wii U premium..
The pad works just fine.. The blue light isnt flashing.. But nothing show up on my TV..
It's a panasonic TV.. Tried both HMDI slots in my TV.. Tried a different HDMI cable and still nothing..
When i go into the settings on the controller, it has for some reason set the TV connection to non-HDMI..
But when i try to change it to HDMI i tells me to check the connection and that it cant connect to the TV..
The WII U i brand new so i'm hesitant to call it a hardware malfunction but i really cant figure out what else it should be :-/
Thank you for reading