Recently my cable company swapped out a defective DVR for a new one. All was fine until I noticed when changing TV channels the audio was gone, only had video. To get audio for the channel I'd unplug - reconnect the HDMI cable connecting the DVR to the Yamaha RX-A1020, bingo! audio works. But change to another channel, no audio. Unplug - reconnect cable, audio returns. To experiment I connected SAME cable from DVR to TV, no problems, change channels, audio and video works (but with crappy TV speakers of course). So I moved cable to a different HDMI jack on the RX-A1020, bingo! When I change channels, no problems with audio! Could that original HDMI jack gotten fried or something?
AVR - Yamaha RX-A1020
DVR - Arris VIP2250 (AT&T U-Verse)
HDMI cables - Radio Shack
TV - Sony Bravia KDL50EX645 LCD 50" screen
Would upgrading all my HDMI cables to the newest spec be beneficial?