Welp, my Onkyo TX-NR809 apparently has the dreaded HDMI board issue that is caused by a
faulty network chip.
Luckily Onkyo is making good and repairing or offering a $175 rebate to those with the issue. I don't want a new Onkyo receiver (no Audyssey) so I'm opting to get mine repaired. I was considering getting a new receiver anyway for my office so if it comes back working it'll actually save me money.
So I'm glad I decided to test it today and not wire up the new theater with it only to find it broken. Yay...I guess.