I received my 5508 back from Onkyo today. I had taking pictures of the HDMI board before I sent it to Onkyo. I checked the HDMI board today and it is a different board. It looks identical but the writing, some numbers, etc are different. So I know the board was replaced.
Anyway, I connected it to my Verizon Fios cable box and it is still doing the exact same thing. It clicks twice every time I change the channel, pause, rewind, fast forward, etc. I didn't leave it connected long enough to see if there was any audio dropouts but I will assume the new HDMI board fixed that issue
Regardless I can't deal with the clicking. I am going to install the Marantz 8801 tomorrow. Hopefully it works well and I like the sound quality. If that is the case I will be selling the 5508. At least whoever buys it won't have to worry about the HDMI board being bad.
Last edited by beekermartin; 01-10-2016 at 02:56 AM.