[RPi4] Blank Screen on LG 32UN880P Monitor

Hi, I just made a fresh install of 12.0.1 to SD card for an RPI4. On power on I have a blank screen (no input). No rainbow, no libreelec, no kodi.

The monitor is an LG 4K UHD. I am using a standard 3A rpi power supply and an rpi hdmi cable. Disconnecting/reconnecting the cable wakes up the monitor but then it goes back to sleep.

Prior to power on I added "ssh" and "video=HDMI-A-1:1920x1080@60D" to the first line of cmdline.txt.

I captured a log via ssh: https://paste.kodi.tv/fufohalepe.kodi. The log says debug is at level 0. I don't know how to change this to get debug.

Here is the edid decode https://paste.kodi.tv/pimefagoco.

I then did getedid create and rebooted, as I heard this can be helpful. But the display is still black. Cmdline.txt now includes "drm.edid_firmware=HDMI-A-1:edid/edid-HDMI-A-1.bin video=HDMI-A-1:D". This is the log https://paste.kodi.tv/kegumaxeli.kodi.

Could the community provide any advice?

Thanks

Thanks for the suggestions. Your instincts are correct. Bad connection. With SD card removed no firmware screen on the LG 4K monitor. I borrowed an old monitor and the firmware screen came up. Rock solid. Connected to a Hisense TV - intermittent. I filed away part of the case which allows the connector to push in a bit further and get a better connection. It works on the LG 4K monitor as long as its pushed all the way in and doesn't move. Not ideal but it works.

Thanks again.

Can anyone see anything in the logs that might explain why I have no audio over HDMI? The hifiberry hat is working, but I prefer to use the hdmi. I see no hdmi option in sound settings, only hifiberry.

Here is a fresh log for post #4 HDMI audio issue. HDMI audio works when connected to the LG monitor but not the Hisense TV. https://paste.kodi.tv/falafububu.kodi

Thanks. Here is a log file with advanced settings added as per post #6. https://paste.kodi.tv/ivolawopen.kodi. In the log I see "Disabled debug logging due to GUI setting. Level 1." Am I doing something wrong?

As it turns out, a reboot fixed the sound issue. The HDMI drivers were not initialised on first boot when connected to a 55" Hisense TV. They only appeared in the audio option list on 2nd boot.

To clarify, the blank screen issue was when using a 31.5" LG UHD 4K Ergo computer monitor 32UN880P. Please could you amend the title?

Aha. I had set log level 2 as per instructions in advancedsettings.xml link. With log level 1 as per post #8 I am getting a large log file as expected.