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302 posts

Ultimate Geek


# 214382 9-May-2017 09:27
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I've rebuilt 2 faulty SP4's into 1 - essentially swapping mainboard & SSD into another chassis. All good there, tricky but not impossible. 


Now though, I have a problem booting into Windows, & it's killing me. If I let it boot by itself, it'll end up with a black screen - except for once (!) when I got the login screen for about 1 minute before it went dark on me. So I know it's not a hardware issue, it's just Windows & UEFI combining to frustrate.




If I boot from USB recovery disk or into SP4 recovery, it acts as though it has no SSD, except for the Reset option that tells me my hard drive is locked, please unlock & try again. The recommended treatment for that is recboot commands, which I've tried repeatedly to no avail - /scanos always reports 0 Windows installations. I know it's lying to me, I've seen the login page. (Telling SP4's to stop lying is, unfortunately, ineffectual. Cortana isn't available from Recovery.)




Booting from regular Win10 USB install key shows no hard drive available. Diskpart lists only the USB key. 




I'm sure there's an answer - blindingly obvious, simple & elegant - but I haven't found it. Has anyone here been through this "drive is locked, unlock & try again" drama & found the solution that I'm searching for? 




FWIW - i5, 8GB, 256GB. Transplanted into chassis that previously held i5, 8GB, 128GB. 

Megabyte - so geek it megahertz

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3336 posts

Uber Geek

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  # 1778268 9-May-2017 09:32
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Did you have bitlocker enabled before doing all this?



3336 posts

Uber Geek

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  # 1778273 9-May-2017 09:41
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Also can you boot off a linux USB drive to see if that can see the drive?  


634 posts

Ultimate Geek


  # 1778289 9-May-2017 10:18
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I never had the "unlock and try again" issue so can't offer any help there, but I do remember having major issues when re-installing Windows from USB that went away after downloading the specific recovery image for my SP4 from MS -


Using our corporate Win10 Enterprise image or a Win10 Pro image (downloaded via the MS Media creation tool) just wouldn't work no matter what I tried.

302 posts

Ultimate Geek


  # 1778863 10-May-2017 03:46
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Oh yeah, I tried all the obvious solutions before I posted here. Parted Magic 2017 is the Linux option I tried, & I also used a Win10 PE built in WinBuilder also.

There's some discussion online about NVMe drivers provided by the Intel Rapid Storage Technology not being available for Linux kernels, so after Parted Magic had consumed my time/patience/energy for no good reason at all, I added the latest RST drivers to a WinBuilder iso, compiled that to USB & promptly failed again. *sigh*

Of course I've also tried the official Surface recovery USB (the one that downloads at snail's pace for 8 out of 9Gb before failing) too - same result. No SSD on display.

Megabyte - so geek it megahertz

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