I tried downgrading by manually flashing jetpack 4.3 as described in this post (Xavier Update Difficulties) and that process seems to complete successfully. But even so, the monitor does not detect hdmi signal on reboot. I have captured the log from the manual flash. I have also captured the log from the debug port during the manual flash and another log from a regular bootup after the manual flash. manualflash.log (43.6 KB)