Originally Posted by DanF8500
You're having hdmi handshaking issues. When I hear A/V owners say, "Sometimes it works, sometime it doesn't", those are timing issues....If this was a problem with all 8500's, every owner would be experiencing what you and a few others have experienced, but this is not the case. To help alleviate this problem with your 8500 and other A/V equipment in your hdmi chain, the proper order which you turn on your equipment could make a big difference. It's a good idea to power your tv only "after" all the other components you want to use (avr, pre/pro, cable box, blu-ray players, gaming devices, etc) are fully powered up. Problems (hdmi handshake issues) arise when you try to bring up your tv before your other components have a chance to stabilize/boot up their firmware. Glitches in the hdmi lines during power up can lock up the hdmi handshake communications...some devices are more sensitive than others with regards to this. Your mix of audio/video gear seems to be more susceptible of these critical hdmi handshakes.
Also, make sure "all" your hdmi cabling is high speed....longer runs of cabling could also cause handshaking issues because signal/syncing time outs between when a receiving device gets the handshake from the sending device can be possible with longer runs. Longer runs (over 6 ft) of conventional/passive hdmi cabling can usually be resolved with an active hdmi cable, such as the monoprice redmere cables. Passive hdmi cables are spec'ed at 6 ft....anything longer (and sometimes even shorter length) can screw up signal timing of the hdmi spec, especially when the sending/receiving components aren't ready, for various reasons, to send/receive handhsakes in a given timeout duration.
Thanks Dan. I'm just now getting my HT setup in my new home to a point where I can test this more accurately. Before when I was seeing this problem I was running everything through my AVR and the STB was actually going through my Xbox One as well. I would use the Xbox One remote control to power on the Xbox which would in turn power on the AVR and TV as well. I think, if I remember right, it would seem to power on the TV possibly before or around the same time as the AVR and STB, I can't say for sure. I would guess the handshaking issues were probably the issue with that setup after reading your explanation. It seems very likely. And thats when I experienced the bulk of this issue and had my frustrations. It was an easy fix then as the TV was on the stand and I could easily reach behind it and unplug it. But it annoyed me and I wanted to get to bottom of it. I was lazy and didn't bother and then we found our house and packed it all up and moved.
Since we've moved to the new house and I've setup my components again, I decided not to run the STB through the Xbox One this time.
I have good HDMI high speed cables, monoprice as a matter of fact. I am just now starting to test powering on the TV last and have so far not had an issue. Once I get the universal remote setup I will also delay the TV power on till after all the other components are on. Right now I'm just manually powering on everything and the TV is last, and its been working. This is only a few days of testing though.
I will continue to test, leaving the TV as the last thing that powers up and see how this goes. So far its been working, this may be the answer and something I need to more diligently pay attention to going forward.