Ok so I checked the voltages on each TMDS pair out at the chip pins. This is with the cable plugged in to a tv in order to show a load.
Tx2p 2.69v Tx2m 0.2v Tx1p 2.64v Tx1m 3.19v Tx0p 2.64v Tx0m 3.2v
Tx2m (channel 2 negative) is not showing the correct voltage as far as I can tell. It should be in the 2-3v range according to some datasheets I read about hdmi.
Maybe the it6613 chip is bad?