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I stumbled across this article the other day.  See if this helps?

https://forums.hak5.org/index.php?/topic/37227-chromebook-not-charging-stuck-at-1-heres-the-fix/

On Thu, Mar 30, 2017 at 9:27 AM, Drew Blanchard <[log in to unmask]>
wrote:

> We’re using the original NL 6 (for education markets).
>
> More details:  light for the charger does not come on at all when charger
> is plugged in (even after changing the charger, port, internal cables).
> ChromeBook works until the battery is dead - then we’re S.O.L.
>
> We’ve replaced/checked everything except the mobo on these devices,
> swapping out parts which are known to be good to see if it makes a
> difference.  At no point can we get the green/orange light to come on - and
> we cannot get the device to power up.  We’ve even tried the old iPad trick
> of leaving the device plugged in for many hours to see if it was just
> “really dead.”  Also tried connecting an external display to see if it was
> simply a problem with the NL 6 screen.  Nope.
>
> Drew
>
> On Thu, Mar 30, 2017 at 8:23 AM, Craig Donnan <[log in to unmask]> wrote:
>
>> Also Drew - there are several NL6 models, but I imagine you are referring
>> to the original NL6 and not some other flavor.
>>
>> C
>>
>> On Thu, Mar 30, 2017 at 8:01 AM, Keith Puffer <[log in to unmask]> wrote:
>>
>>> Drew,
>>>
>>> Several of our schools are using the same model.  Only seen this once
>>> before.  One item to look at if you have not already is resetting the LVDS
>>> cable at both board and screen ends.
>>>
>>> Do you think it is the battery/power issue or screen?  Does the charge
>>> light go from amber to green after it has been "charged" for a while
>>> indicating a good battery, but the power throughput to rest of the device
>>> isn't working as it should?  I know that with the CTL device that I am
>>> referring to it took a while to figure out the cause.
>>>
>>> As Craig Donnan has added, CTL support is fairly good at trying to
>>> assist with these issues.  My assumption is that you have already gone that
>>> route...
>>>
>>> Please let me know what "fix" you ultimately use as we have multiple
>>> schools running these.
>>>
>>> Good luck!
>>>
>>> Keith
>>>
>>> On Thu, Mar 30, 2017 at 7:47 AM, Drew Blanchard <
>>> [log in to unmask]> wrote:
>>>
>>>> Greetings!
>>>>
>>>> We’re seeing a trend here, and wonder if anyone else has experienced
>>>> this problem - and hoping someone might have a solution.
>>>>
>>>> We have 12+  CTL NL6 ChromeBooks that are just out of warranty.
>>>> Suddenly, they do not accept a charge.  We’ve swapped chargers, charging
>>>> ports, and the cables which link the port with the motherboard.  We’ve
>>>> swapped batteries, and even tried removing the battery from the machine and
>>>> powering up directly from the power supply (this often works with Macs
>>>> which have a power/battery problem).  Nada.
>>>>
>>>> Replacing the motherboard itself is almost as much as purchasing a new
>>>> machine, so that’s not worth it.
>>>>
>>>> Thoughts?
>>>>
>>>> Thanks!
>>>>
>>>> Drew
>>>>
>>>> --
>>>> Drew Blanchard
>>>> Technology Integration Specialist
>>>> Google Apps Certified
>>>> Winooski City Schools
>>>> 60 Normand St
>>>> Winooski, VT 05404
>>>>
>>>> vm: (802) 383 - 6073 <(802)%20383-6073>
>>>>
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>>>
>>>
>>>
>>> --
>>> Keith Puffer
>>> Technology Coordinator
>>> Washington West Supervisory Union
>>> 340 Mad River Park, Suite 7
>>> Waitsfield, VT 05673
>>> 802-496-5486 <(802)%20496-5486>
>>> Fax: 802-496-6515 <(802)%20496-6515>
>>> GoogleVoice: 802-870-0630 <(802)%20870-0630>
>>> https://wwsuvalley.on.spiceworks.com/portal
>>> <https://wwsuvalley.on.spiceworks.com/portal?_ga=1.58522082.973774531.1464180008>
>>>
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>>
>>
>>
>> --
>> Craig Donnan
>> Network Administrator
>> Chittenden Central Supervisory Union
>> Essex High School
>> p. (802) 857-7000 x.1030 <(802)%20857-7000>
>>
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>> CONFIDENTIAL COMMUNICATION. THIS MESSAGE MAY NOT BE FORWARDED.
>>
>> The information contained in this communication, including
>> any attachments, is confidential,constitutes privileged
>> communication, and is intended only for the use of the addressee.
>> This message may not be forwarded without prior consent from
>> the sender. The information in this e-mail is also protected
>> by the rights afforded under Family Educational Rights and
>> Privacy Act (FERPA) and school district policies.  Any unauthorized
>> use, forwarding, distribution,disclosure, printing or copying is
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>> communication in error, please notify us immediately at 802-879-8192
>> or return e-mail,and delete any copies of this message immediately.
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>>
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>>
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>
>
>
> --
> Drew Blanchard
> Technology Integration Specialist
> Google Apps Certified
> Winooski City Schools
> 60 Normand St
> Winooski, VT 05404
>
> vm: (802) 383 - 6073
>
> I apologize for the following long, wordy, and required signature statement
>
> CONFIDENTIAL COMMUNICATION. THIS MESSAGE MAY NOT BE FORWARDED.
>
> The information contained in this communication, including any
> attachments, is confidential, constitutes privileged communication, and is
> intended only for the use of the addressee.  This message may not be
> forwarded without prior consent from the sender. The information in this
> e-mail is also protected by the rights afforded under Family Educational
> Rights and Privacy Act (FERPA) and school district policies.  Any
> unauthorized use, forwarding, distribution,disclosure, printing or copying
> is strictly prohibited and may be unlawful.  If you have received
> this communication in error, please notify us immediately at
> 802-383-6000 or return e-mail,and delete any copies of this message
> immediately. Any inadvertent disclosure of this communication shall not
> compromise the confidential nature of the communication.
>
> -----------------------------------------------------------------------
>
> Search <http://list.uvm.edu/archives/school-it.html> the SCHOOL-IT Archive
>
> Manage <http://list.uvm.edu/cgi-bin/wa?SUBED1=SCHOOL-IT&A=1> your
> Subscription to SCHOOL-IT
>