Power & Source of Big Ideas

I guess I’ll reply to my own reply. I tried connecting my M4 to an LG TV and it worked, so it seems I have a compatibility issue between my M4 and my PC monitor. The monitor is HDMI 1.4, I’m not sure if that is the root of the issue, but at least I know my M4 is working.
I'm having the same problem. No output to HDMI connected monitor. Have tried two different HDMI cables. Have tried the supplied power supply as well as a 5V 3.5A that I had on hand. Flashed several of the distributions downloaded from the Google Files mirror. All I get is a solid red LED and a flash...
I'm just adding in as I'm seeing the same problem. I just received the NanoPi M4 and I can't get anything output on my HDMI-connected monitor. I've flashed (Balena Etcher) the following distributions to a 64GB MicroSD card: rk3399-sd-buildroot-linux-4.4-arm64-20190718.img rk3399-sd-friendlydesktop-b...
Same problem here. Flashed several .img files, several times, with Etcher. HDMI cable is OK (at least works with a RPi 3B) as is the monitor (same). Get the red PWR LED and the STAT LED is double-flashing (two quick flashes, then a short pause). No output to the monitor. Connected with a 5V, 3.5A (C...