BeagleBone Black - No HDMI Output

I tried and still nothing

login as: root
root@’s password:
root@beaglebone:~# cat /proc/cmdline
console=ttyO0,115200n8 video=HDMI-A-1:1920x1080@24 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait
root@beaglebone:~# fbset

mode “1024x768-0”

D: 0.000 MHz, H: 0.000 kHz, V: 0.000 Hz

geometry 1024 768 1024 768 16
timings 0 0 0 0 0 0 0
accel true
rgba 5/11,6/5,5/0,0/0

root@beaglebone:~# xrandr
Can’t open display


I suggest you go the RMA route. If it can’t read the EDID from a display that is powered up and not asleep, then it can’t figure things out for sure.


1920x1080@24 is an odd-ball resolution that most monitors won't support.

If you don't see an HDMI display, IMHO the first thing to try is
forcing a resolution that all HDMI displays are required to support, ie:


If that works, you just have to figure out a resolution your monitor
and 'bone will both be happy with.