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- Dreaded 3F0 error on an old HP Pavilion, but I've put in som...

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05-26-2025 04:01 PM
I'm trying to fix an old HP Pavilion 360 laptop with Windows 10. I know, I know. The thing gives the deadly 3F0 install an operating system... error.
So I have:
Run the H/W Diagnostics UEFI which gives a Long DST failure code of id 9uvu2c-7jxclj-mfpwl1-61ah03. Can't find that explained anywhere, but I bet the explanation of said error would help immensely.
Built a bootable Windows Recovery Env and, via the command prompt, I can peruse the C: file system and it's all there.
Apparently it's not an issue with HDD existence or communications.
Ran bootrec /rebuildBCD Returned with Scanning all disks for Windows installations. Successfully scanned Windows installations. Total identified Windows installations: 0. Huh, that doesn't look good!
Lastly I ran diskpart, list disk. Got disk 0 online 465GB both Size and Free. Also disk 1 online 57GB Size and 25GB Free. 1 must be my WinRE USB. Now the confusing part for me. In diskpart the cmd sequence sel disk 0 - list vol followed by sel disk 1 - list vol gives identical answers for both disks. Ltr: C, Label: Recovery, Type: Removable Size: 32GB Status: Healthy. I'm a UNIX guy and I have surrendered. I'm ready to junk this baby. Can anyone tell me what that 9uvu2c-7jxclj-mfpwl1-61ah03 means for my path forward?
Thanks in advance for any help anyone can provide.
V/r,
JC
05-26-2025 05:47 PM
Please use the following Guide
HP PCs - Hard disk 3F0 boot device not found error
Regards.
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