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07-09-2021 05:38 AM - edited 07-09-2021 09:30 AM
I have an HP Z840 with an NVIDIA K5200 video card. The problem I have is that when I enable video Bios as UEFI the system won’t boot, blank screen. I then have to boot with another video card (GTX 1050 TI) to revert back the BIOS setting as legacy.
The K5200 is an HP.
07-10-2021 12:45 AM
i suspect the k5200 should support UEFI/legacy , the 1050 is a legacy/UEFI device
install both cards while in uefi mode (with the 5200 being a secondary display device)
does the OS see both cards?
use a program like GPU-z to check both cards
07-10-2021 08:39 AM - edited 07-11-2021 12:28 PM
the K5200 specs says the card support UEFI. I had a K6000 before that was working in UEFI mode in a Z820. When I would take that card in a Z840 I would get the same problem, no boot and blank screen in UEFI mode.
BTW, I get the same problem when I enable Secure boot.
07-19-2021 12:30 AM
I've the same problem and I bought a new motherboard due to this error.
Re: Secure Boot on HP z840 - HP Support Community - 8115570
I thought that motherboard is broken after testing two graphics cards (K5200 & M5000) with the same result.
07-22-2021 06:05 PM
you need a clean 64 bit windows, INSTALLED with secure boot enabled in the bios and GPT format enabled leave CSM disabled in the bios
you may also need to reset/remove the existing secure boot keys from the bios using the reset key option once done then try setting the video bios to uefi mode and proceed with a clean GPT windows install
07-23-2021 05:56 AM - edited 07-23-2021 07:32 AM
there is no possibly to boot from anything when video is set to UEFI mode (or secure boot is enabled). No post, no BIOS message, nothing just a blank screen. So no way to install Windows 10, beside, Windows 10 is already installed in GPT / UEFI mode. In order for me to bring back video legacy mode I have to install a GTX 1050 TI so I can access the Workstation BIOS. I’m open for any suggestions.
07-23-2021 10:45 AM - edited 07-23-2021 10:57 AM
Secure Boot settings for business notebooks and workstations
after the step highlighted in red, the boot screen where I must enter a random PIN, does not show up with my original HP Quadro M5000. > Due to, no signal! (But it does with an GTX 1060)
6. Select the Main tab, select Save Changes and Exit, and then click Yes to display a PIN
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