I am not using the BigTreeTech HDMI7 for Klipper, but as a display for a Raspberry pi 5 with desktop. I was having an issue where the screen stayed black, and what I found is that the BigTreeTech documentation does not provide the right code to enter (it is missing the = sign between “hdmi_cvt” and “1024” (4th line). The correct code to add to the config.txt is:
# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=2
hdmi_mode=87
hdmi_cvt=1024 600 60 6 0 0 0
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
hdmi_drive=1# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=2
hdmi_mode=87
hdmi_cvt 1024 600 60 6 0 0 0
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
hdmi_drive=1
I hope this helps anyone having issues with this BTT HDMI 7 display.