Yamaha (TSR-700) and LG (75QNED80ARA) HDMI connection issue

[rnaeye]

This is driving me crazy, and I really want to understand the cause of it. My Yamaha and LG TV are connected by eARC port. I run apps from my TV, such as Apple TV and Prime Video. By chance, I have discovered that if my HDMI cable is "High Speed, HDMI Cable 2.0 (4K) 18Gbps" everything works fine. However, if I connect TV to AVR by a higher spec cable for example "Certified 2.1 8K HDMI Cable 48Gbps 4K120Hz", I have following issues: Yamaha display flickers and sound keeps cutting, and even nothing plays I can hear low popping sound time to time. I know this is not the cable issue as I have tried two different 8K HDMI cables which are different brands.

I was wondering what is causing this? By using "High Speed, HDMI Cable 2.0 (4K) 18Gbps" am I compromising anything. I either stream or watch Bluray or 4K movies played by a Panasonic Blu Ray player which output 4K60Hz maximum. I have no game console.

 

[lovinthehd]

Why run the higher spec cable then? What specific cables and lengths are you using?

 

[rnaeye]

Why run the higher spec cable then? What specific cables and lengths are you using?

Short answer is that the cables are 2m (= 6.6 feet) long.

Why am I trying to run higher spec cable? Long story: My 4K Roku box started buffering a lot when I streamed (download speed was low although my Wifi speed is excellent). I was trouble shooting including HDMI cables, and I happened to have higher spec cables in hand as my existing cables did not have any labels on them. Later I figured out the specs from my shopping history. It was easier for me to stream from Smart TV (no buffering) instead of troubleshooting Roku box (another mystery for me). This is where I am at now.

 

[lovinthehd]

Short answer is that the cables are 2m (= 6.6 feet) long.

Why am I trying to run higher spec cable? Long story: My 4K Roku box started buffering a lot when I streamed (download speed was low although my Wifi speed is excellent). I was trouble shooting including HDMI cables, and I happened to have higher spec cables in hand as my existing cables did not have any labels on them. Later I figured out the specs from my shopping history. It was easier for me to stream from Smart TV (no buffering) instead of troubleshooting Roku box (another mystery for me). This is where I am at now.

At that length I'd think even properly rated cables wouldn't have any advantage. I'd think more about your service provider than the hardware spec especially as cables didn't help. Claimed specs are only so reliable otoh. Maybe more information could help but seems you've covered the necessary so far....

 

[everettT]

Short answer is that the cables are 2m (= 6.6 feet) long.

Why am I trying to run higher spec cable? Long story: My 4K Roku box started buffering a lot when I streamed (download speed was low although my Wifi speed is excellent). I was trouble shooting including HDMI cables, and I happened to have higher spec cables in hand as my existing cables did not have any labels on them. Later I figured out the specs from my shopping history. It was easier for me to stream from Smart TV (no buffering) instead of troubleshooting Roku box (another mystery for me). This is where I am at now.

Your issue is with your network. Can you not hardwire the Roku? Also speed alone doesn't tell the whole story with the quality of connection. Can you screenshot a speed test from the Roku or phone?

 

[rnaeye]

Your issue is with your network. Can you not hardwire the Roku? Also speed alone doesn't tell the whole story with the quality of connection. Can you screenshot a speed test from the Roku or phone?

This is my basement setup, where I do not have option to hard wire Roku with ethernet (old house with coaxials; only place I can have ethernet cable is first floor) I did a test yesterday: for Roku, download speed was less then 1Mbps, and my iphone had ~30 Mbps download speed at the same location. At the different location of the house (upstairs=fios router is at the first floor), download speed of iPhone can reach to 300 Mbps.

 

[everettT]

This is my basement setup, where I do not have option to hard wire Roku with ethernet (old house with coaxials; only place I can have ethernet cable is first floor) I did a test yesterday: for Roku, download speed was less then 1Mbps, and my iphone had ~30 Mbps download speed at the same location. At the different location of the house (upstairs=fios router is at the first floor), download speed of iPhone can reach to 300 Mbps.

You might need to move the Roku around the room to get improvement. Our house in Missouri has plaster and chicken wire and has a couple of difficult rooms. Do you have cable outlets in the basement? If so and your router supports it MoCA might be an option for you. https://en.wikipedia.org/wiki/Multimedia_over_Coax_Alliance

 

[rnaeye]

You might need to move the Roku around the room to get improvement. Our house in Missouri has plaster and chicken wire and has a couple of difficult rooms. Do you have cable outlets in the basement? If so and your router supports it MoCA might be an option for you. https://en.wikipedia.org/wiki/Multimedia_over_Coax_Alliance

You were spot on. I walked with my iPhone is the basement. It has many dead spots, overall low signal. It used to be better I wonder what happened. The issue seems to be basement Wifi strength, not Roku itself.

I have cable outlets at home. I used to get my connection to through cable to my wifi router. I am confused; when Fios technician came a few years ago to upgrade it to 200Mbps, he told me that I can no longer use coaxial cables for anything above 100Mbps and installed an ethernet cable to my router. I currently have 300 Mbps plan. I will check if I can use MoCA adapter or something like that. I am missing something though. Did I misunderstand the fios technician, or is there a speed limitation for coaxial cable?

Note: I just did some Google Search. The issue is that FiOS uses MoCA 1.1 over coax for the WAN connection, and MoCA 1.1 maxes out at ~100 Mbps in real-world WAN use. Also I learned that using MoCA 2.5 adapters I can use my cable outlet, which seems to be the best option for me.