twells, thanks for the reply! I was checking with the power on. Noticed that you had the unit in standby, so I checked mine in standby and it is indeed already at 1.47.
I also double-checked the pin connections on my rs-232 with gender bender, and the TX-RX lines are crossed from the laptop to the R-972. Not sure why they won't talk, or why the update program never times out (well, at least for 30 minutes).
I didn't find any loose connections inside of the R-972. Reseated most of them just to be sure.
Repair service may be needed to get HDMI2-4 working.