If you don't want to return the broken case you should be able to work around the issue by adding video=HDMI-A-1:D to cmdline.txt (after "quiet", on the same line) or runing getedid create with the TV connected directly to the RPi on HDMI0.
so long,
Hias
Hi HiassofT
I had a similar problem im not sure whats happening and why its only happening on certain tvs.
I had the same issue. A fresh install of 10.0.2 LibreElec would extract reboot to the rainbow flash screen then I would just get a black screen..
I could login via ssh but had no joy with getting the edid data via
getedid create
At this time.
To fix the issue for me I had to set a lower resolution by adding
video=HDMI-A-1:1280x720M@60D
to the end of the cmdline.txt file
("video=HDMI-A-1:D" didn't work in my case).
The after rebooting I could then log back in via ssh and get the edit data from my TV using
getedid create
It seems that I was only able to get the edid data from the TV after I had a display.
Philips 4kTV, no case original Rpi4 hdmi lead.