@Xnet

Don't worry about it, I managed, sorted out!
Mini is showing NVME as a boot device, so should be fine!

Tnx again for a very detailed guide and step by step instructions!

Regards,
Dee.

Good job Dee. Glad you managed on your own - gives greater satisfaction. Enjoy your Win 10 mini!
Xnet

Hi, @BigMax

I have a G1 800 SFF and when I flashed with moded bios I have experienced your situation. I have fixed the issue of don't booting of my system by flashing the BIOS with an external programmer by a repair store with original bios file of HP site. I have fixed the issue of Ethernet card and I can help you to solve it. I also need your BIOS moded file to flash my pc to be able to boot from my NVME PCI adaptor. Tnx

@Xnet, could you please help me to find out why moded bios was corrupted? or how can I check the moded bios that be fine and equal to original bios from HP?

Yes, sure.

Hi, @BigMax

I have a G1 800 SFF and when I flashed with moded bios I have experienced your situation. I have fixed the issue of don't booting of my system by flashing the BIOS with an external programmer by a repair store with original bios file of HP site. I have fixed the issue of Ethernet card and I can help you to solve it. I also need your BIOS moded file to flash my pc to be able to boot from my NVME PCI adaptor. Tnx

@Xnet, could you please help me to find out why moded bios was corrupted? or how can I check the moded bios that be fine and equal to original bios from HP?

Hi @kamran2000 - could be many things in play. If I were to guess, you either inserted the ffs driver in a wrong section, either the tool you used messed it up (especially MMTool). If you post the file I may be able to see. Did the repair store give you a copy of the original ROM (16MBfile) before flashing the HP file? That could be repaired with the unmodded BIOS(10MB - if you still have it), and it's better than the generic HP ROM. You're probably running the Intel ME in factory mode now. If you don't have that, you can still re-do the procedure to get the driver in and boot from NVME.

I just noticed now that yours is 800 SFF and not a mini DM. That model may have the BIOS sections a little bit different than the mini, and the numbers may not be the same as in my procedure. That could as well the cause.

Tnx, the repair store used the original BIOS file from HP support website. Below link is the latest BIOS file from HP website for G1 800 SFF that I have uploaded. Could you help me to mode this original file to have NVME device in the boot menu and boot from it?

https://easyupload.io/kxjbva

@kamran2000
You may not be able to flash the full file with Intel Flasher. I checked and it seems its sections are the same with the mini. I extracted only the first A70000h and added the ffs driver in the attached zip. Flash it from Windows 7/10 64 bit with:

fptw64 -A 0x580000 -L 0xA70000 -F modBIOS-L01_0278.BIN

Let me know how it went.

@Fernando

I can't recall how it was before, but it looks crispy clear now. Thanks for doing it. I didn't know you can alter someone else's posts.

Xnet

How can I do "fptw64 -A 0x580000 -L 0xA70000 -F modBIOS-L01_0278.BIN"?

Is it any risk of black screen after flashing by this moded file?