Now get ready for this I did find a verifiable system bug in the CBIIIHD and I think you'll find it quite odd. I am using RS232 commands to control the CBIIIHD. I say 'verifiable' since I can reproduce it every time in my system, YMMV...
I have input 1 set as direcTV and using HDMI1 input for audio/video, as well as coax1 as a second source (A-D toggle).
I have input 2 set as the Oppo BD using HDMI2 for audio input only. (I have the Oppo's second HDMI out as video only to the Elite panel's input 2).
I have the CB's HDMI out going to input 1 on my Elite 70 panel, so it is passing through the direcTV video.
If I use my remote and RS232 command to switch the CB from an HDMI input source (direcTV) to the Oppo on input2/ HDMI2, and then back to input1/HDMI1, the audio on the CB disappears and the unit is semi locked up. Volume and other commands will not work. Doing an A/D to get audio from Coax1 does not work either. I have to hard reboot the CB using the switch on back. When it boots back up, if I still have two HDMI sources plugged in, twice I did not get any audio and unit was still semi frozen. Twice it did have volume but was responding to RS232 very notchy'.
If I remove one of the HDMI sources (either one), and use coax for one of the inputs instead of HDMI, and only use one of the inputs for HDMI, there is no problem at all period. For example, if I use HDMI for the Oppo and coax for directv, no problem. If I use coax for the Oppo and hdmi for directv, no problem. If I have HDMI physically plugged in for both input 1 and input 2 sources, that's where the problem starts.
And, here is the kicker- if I leave the HDMIs plugged in, but remove the RS232 cable, there is no more issue either (have to use manual controls or factory remote). How are these two subsystems related? I am using 115 baud for the RS232 settings, never had any issue with my other CBIII but of course no HDMI on that unit.
I have submitted this issue to John and will post any further info-