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We had the same issue with a number of our Lenovo N22's over the summer. I
had a weeks-long conversation with Google developers and the final result
is that the recovery partition that is stored separately on the motherboard
of Chromebooks has become corrupted. These machines would not boot into a
recovery USB, nor would they boot using the Lenovo shim. The only fix is to
replace the motherboard, which will require a shim to reinstall the OS from
scratch and run through the Google certification pieces.



Nick Clark
Lead Technician
Champlain Valley Union High School
Champlain Valley School District
IT Help Line (802) 482-7121

On Wed, Oct 4, 2017 at 11:29 AM, Drew Blanchard <[log in to unmask]>
wrote:

> Recovery sticks were created via Google’s own ChromeBook Recovery Utility
> - per CTL (and Google’s) directions.  This is the only way we’ve ever been
> able to create recovery media.  Tried “tricking” the affected ChromeBook by
> using recovery media for a different models ( e.g. CTL NL61, or an HP
> model) but the device immediately rejects the boot stick - and said Chrome
> OS was not on it.
>
> Since swapping the hard drive did not change anything, it seems like the
> problem might lie with the mother board.  Again, though, the growing
> frequency of this problem is …. curious.
>
>
>
> On Wed, Oct 4, 2017 at 11:06 AM, Raymond Ballou <[log in to unmask]> wrote:
>
>> Drew
>>
>> You didn't say, but I am guessing you have tried creating recovery media
>> from more than one donor N6.
>>
>> and also tried from a machine that is not a CB?
>>
>> In general, chromebook ninjas have also helped me out before (until they
>> find out a device is managed) but not with something like this.
>>
>> Is Google any help or are they telling you to seek out CTL?
>>
>>
>> R
>>
>> We’ve tried many different recovery sticks (even tried different
>>> manufacturers and sizes)  but the recovery process simply freezes.  Every
>>> time.  Leaving them to “restore” over night does not help. We’ve spent
>>> waaay too much researching and problem solving and have not made any
>>> headway.
>>>
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>
>
> --
> Drew Blanchard
> Technology Integration Specialist
> Google Apps Certified
> Winooski City Schools
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