Originally Posted by SantaF0x
Hi collective mind, I tried to read through all 228 pages but didn't find a same issue... maybe someone knows what to do.
I have a 75Q90R and Marantz SR5014 (2019 year model with 4K, Dolby Vision and eARC), connected properly for ARC with normal AmazonBasics cable. Everything works fine for ARC connection (when I use TV's internal apps), in this case Marantz provides sound as expected. It also shows it's setup, HEOS and other screens when I select HDMI3 input on TV. However Marantz's GUI looks weird with dimming but this is not a problem for now.
Yesterday I've purchased Shield to use it as a Plex player for "heavy" rips with TrueHD, DTS MA and so on. When I connected it to one of Marantz's HDMI ports, Q90R has immediately lost the HDMI signal while sound from the Shield's setup procedure appeared in the receiver's speakers. It was strange. With disconnected Shield, Q90R started to show Marantz's GUI again.
I did a factory reset for Marantz, and Shield's video appeared on TV. 4K SDR, 4K HDR - no problem. Marantz even correctly merged its data into signal (info, sound volume etc.). Ok, I thought that the problem has gone.
In the morning the same issue started again - no video from Marantz at all, neither from setup screen nor from Shield video input. Marantz's web console shows that Shield switched to 1080p/60Hz but no video is sent to the receiver video outputs.
Well I understand that it may looks like Marantz's problem, however there are lot of comments about Samsung's problems with HDMI handshakes so I decided to start from Samsung QLED TVs forum, just in case if someone already faced this problem.
P.S. I also plan to try to test Marantz with "dumb" computer monitor with HDMI input tonight and check if the problem continues. I have no idea what to do next. The only hope is eARC and direct connection of the Shield to the TV.
Ok, there's small update on above. I had a little time yesterday to play with all this stuff, but what I did:
1) turned off: on Samsung Q90R - Anynet+, on Marantz - all HDMI settings (no passthrough, no HDMI control, no ARC), Shield - CEC control off.
Shield display output and Marantz GUI appeared, so the issue is not connected to "Enhanced" 4K setting on AVR. With Shield turned off and its input selected, TV says that there is no signal. Ok, it's logical.
2) I turned on ARC in Marantz HDMI settings (passthrough is still off, HDMI control is off) and Anynet+ on TV.
Everything continue to work, simple CEC control also started to work between TV and AVR (sound volume control).
So only two settings was left off: HDMI passthrough and HDMI control. I will do more testing, but it seems that the problem lies beneath one of them, and I bet it is "passthrough".