I have the OKdo ROCK 4C+ Starter Kit which has been working fine up to now.
But now the 4K HDMI output has stopped working: I cannot see the desktop - my monitor says, "No signal"
I have tried a different HDMI cable
I have verified that the monitor works with another computer.
The Rock itself is still running:
- the mouse lights up when moved
- keyboard 'lock' lights work
- I can SSH from another computer
I have tried both a restart and a shutdown-powercycle.
I have tried just plugging into the other HDMI socket - still no signal.
Any suggestions? Has it just died?
Are there any diagnostic tests I can run from an SSH session?
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