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Try building or downloading a shim...

https://www.google.com/url?sa=t&source=web&cd=3&ved=0ahUKEwjd0u-EndfWAhXJ6oMKHayDA14QFggiMAI&url=http%3A%2F%2Fmychromehome.blogspot.com%2F2014%2F07%2Fdownload-chromebook-recovery-image.html%3Fm%3D1&usg=AOvVaw1ZPaPEfkaK_u2pCZdTTwFt

On Wed, Oct 4, 2017 at 10:53 AM Drew Blanchard <[log in to unmask]>
wrote:

> Greetings!
>
> We now have a growing pile (15+) of CTL N6 Education ChromeBooks which
> have become unusable (and out of warranty).  The device shows an OS
> corruption error with an exclamation point which says we need to reinstall
> the OS.  We’ve worked on lots of ChromeBooks over the years, so that’s not
> a real challenge.  What *is* problematic is the fact these affected devices
> CANNOT be restored.  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.
>
> We contacted CTL directly and tried their suggestions, including:
> disconnect the battery, wait at least one minutes and make sure the trickle
> charge has completely emptied, reconnect and try again.  Nada.
>
> Flush the local memory and do a hard reset.  Didn’t change anything.
>
> We even tried replacing the internal flash/hard drives.  Nope.  Stuck in
> recovery process.  Forever.
>
> Does anyone have a suggestion?  We’re extremely frustrated and rapidly
> running out of machines for our classrooms at this rate.  The large number
> of failures, and the frequency, makes us think we’re missing something.
>
> Thanks!
>
> Drew
> --
> Drew Blanchard
> Technology Integration Specialist
> Google Apps Certified
> Winooski City Schools
> 60 Normand St
> <https://maps.google.com/?q=60+Normand+StWinooski,+VT+05404&entry=gmail&source=g>
> Winooski, VT 05404
> <https://maps.google.com/?q=60+Normand+StWinooski,+VT+05404&entry=gmail&source=g>
>
> vm: (802) 383 - 6073
>
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