I can't find any guides to changing the logic board of the drive anywhere. I have the exact same problem. I replaced drive, got the 160-1402 error, put old drive back in and Wii U boots fine. At least I know the console itself is fine. We can still play all of our downloaded games until ifixit posts a guide!

Someone please help us!!!

By the way the guide for swapping Wii U drives is excellent, we just need the guide for swapping the logic board as it is necessary.

Thanks