Red light always on, no signal

I know there are a few topics open about this issue, but nothing I have tried so far works.

My LattePanda (fresh out of the box) has the red light on withno HDMI signal. I have tried the hard reset method here: https://www.lattepanda.com/forum/topic/312903 . I can turn the board on and off using the power buttons (the red light turns off when I hold down the power button and turns on when I press it again)

I am using a reliable power source and cable, which I have used for my many other LattePandas. I have also tried powering the board via the 5V/GND pins, with the same result.


What do you reccommend?