Rock Pi 4C plus defective

[awneil]

@Gerald_Jansen

Most don’t display using the HDMI ports … A review of online posts supports my position

Would be interested to know what other posts you’ve found on this.

I already know these 2:

Force HDMI output on RockPi4

Hi, I’m working with a RockPi4 using DietPi. Now I’m facing an issue with a projector which doesn’t get recognized at the startup and the only way I found it to be tricked is starting up with another screen and then switching plugs. I’ve just purchased one of those HDMI plugs that might solve it but, in the meantime and cause I may need it for other purposes what I’ve seen is the “soft” solution which I’ve seen that in other SBCs is as simple as adding “hdmi_force_hotplug=1” in the config.txt. …

Rock-4C+ HDMI stopped working

I’ve had it for a couple of months, working fine. This afternoon, the HDMI just stopped working. It’s as if the Desktop went to sleep, but now can’t see any wakeup signals (mouse movement, KB) - even though the mouse & KB are clearly working. I can still login via SSH. Full details here: https://www.rs-online.com/designspark/rock-4c-hdmi-stopped-working Is it broken? What other tests can I do?