Windows 11 - Blank Monitor on Boot

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Occasional Visitor

Installed and ran Windows 11 up until yesterday.  After a recent update and reboot, Win 11 would no longer display on the Monitor.  It did make the Microsoft "sound" indicating it had booted to Windows login - just couldn't see it.  Additionally there was no Post screen display during bootup.  By power cycling 2-3 times I could get to the Windows login screen - but still with no Post screen during bootup.  PC would then work fine but "hang" when trying to login in the morning - PC is on 24/7/365.

- replaced monitor cable, no change.

- tried another monitor, no difference.

 

Reverted back to Windows 10 and PC runs normal again w/ Post screen at bootup.  System - Supermicro X11SCZ-F motherboard w/ Xeon E-2146G, Quadro M2000 GPU, 64 GB Crucial ECC ram, Samsung 970 Pro M.2 NVME; three other 2.5" Samsung SSD's, Intel 750 SSD, and a 6TB Hitachi hardrive.

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