Long story.... Cloned a Server 2019 M.2 drive I had in another box. Put it in this Z390 box that includes a nVidia 3060. Machine booted up fine. Just needed to install various drivers. Shut it down to install the Intel X520 NIC that was also in the old server so the drivers should already be on this cloned drive. Attempted to boot and nothing. No post screen at all. Just powers up runs through the checks and reboot. Zero display. Decide to pull the nVidia card and try with onboard vid. Nothing. Same issues. Tries to post then reboots...rinse repeat. Pulled the hard drive and same results. Error code stops at D9 from what I can tell since there is no error code 09 for this board. I reset CMOS and also pulled the CMOS battery. Nothing. It will not post and nothing on the monitor. It also looks the the VGA diagnostic LED on the mobo stays lit while the D9 error is displayed either with the nVidia card in or using onboard vid.