Hi all -

Trying to get a 70' run from LG OLED C7 to a Denon 3400H receiver using the Celerity fiber optic cable. 4k sources connected to the Denon are a 4k Apple TV and a Sony X800 UHD BD player.

I am unable to get a steady connection when the Apple TV changes to 4k HDR or Dolby Vision and I turn on Ultra Deep Color on the LG. The Sony X800 appears to work when playing 4k HDR content and the LG changes to Deep Color. However, the connection drops some times and I get a black screen.

I changed the HDMI cables going from both sources to the Denon multiple times. The Belkin 'certified' HDMI 2.1 cables seem to be the least problematic and I've tried at least 2 other 'certified' 4k HDR cables, but they were more problematic. Per Denon's instructions, I have moved the HDMI inputs on the receiver from my 4k sources to the ports closest to the output port.

I have also tried another off-brand directional Fiber optic HDMI cable from the LG to the Denon and it proved worse than the Celerity cable.

Any suggestions...?

What happens when you take the apple or the sony and hot wire directly to the display?

I'll get back to you on this. I tried this when we first unboxed the TV and it was having issues with HDR. However, I wasn't using the 'certified' cables at the time.

Have you gotten into the Denon menu and validated that it was in fact setup for 4K/HDR (they are not out of the box)?

Also "Certified HDMI 2.1 Cables" (?) certified by who?
Also "Certified 4K/HDR Cable" again certified by who?

Yes it's called "Enhanced HDMI" in the menu.

Craig

I personally never had a good experience with the Celerity cables. They've been extremely prone to field failures. If I'm gonna go for distance runs, I opt for the DPL certified models.

The one that really caught my eye was the Inneos Real4k adapter, which is just a set of endpoints that use a single strand of standard fiber. Say goodbye to pulling those bulky, fragile cables through walls! Just pull some run-of-the-mill multimode, terminate it (in under a minute if it's the Cleerline stuff), and you're good to go.

Try using a usb charger instead of the usb on the display

Confirmed.

Confirmed. I have a USB charger plug on both ends (thanks to another forum thread here) thinking it was receiving a bad power signal from the USB port on the display.

It was a waste of money and will be returned, but see this link.

Thank you for the suggestions. This stuff gets super pricey real quick. I guess that's the price to be paid right now for a long-distance stable UHD connection between a source and TV.

I reached out to Celerity and they are sending me replacement DFO ends to try out. Will report back...

It only needs power on the receiver end. Not both

I know at CES they announced a big ~40% price drop with a new kit.. Keep your eyes out!

Quick update. Celerity mailed me 2 replacement DFO ends for their fiber optic cable. The cable ends I received had this little yellow sticker on them. The DFO ends that I currently have have a green sticker on them.

Long story short, the new ends did not work. Couldn't get a successful connection between TV and receiver no matter what I tried (regardless of resolution, content, USB power, etc.). Reverted back to the old DFO ends and the picture was back. Though the 4k issues remain.

I may have been unlucky and received a set of DOA DFO ends. Waiting to hear back from them.