There are 12 cables across the top of the device (six 2.4GHz antennas and six 5GHz), plus the congestion antenna along the side, and a final coax cable along the other side.

Google seems to have some kind of color coding system, which might help for repair, but the board markings don't give us any hints just yet.

Peeling off the second half of the outer shell, we find an interesting antenna arrayed in a double diamond. More on this guy later.

The OnHub's antenna array is revealed in all its Lovecraftian glory, the antenna leads looking spookily like tentacles.