[NTLK] 2000 not switching on

[Rob Moody]

Hi Michael,
Yes I did open the case and removed the rear cover so I could get a better look at the battery bay….while there was a bit of green oxidation around that uniquely Newton designed battery terminal…which I removed with vinegar….there seemed to be no obvious signs of oxidation on the board itself…but I did not go any further for fear of breaking something…but an interesting thing was that I hadn’t noticed before that the board had a funny “Q” like symbol and an image of a Newton “Newt” on it plus a “2001” sticker inside the port bay…

Sent from my iPhone

> On 7 Sep 2021, at 20:10, Michael Sheflin <sheflinm at gmail.com> wrote:
> 
> And there's no backup battery; my mistake.  Could oxidation on the logic
> board cause a short?  If it were a capacitor/degradation issue, I would
> expect a wonkier result.  My 120 briefly started displaying random blocks
> on the screen but then reverted after several days unpowered (which I'd
> guess is the beginnings of a capacitor failure).  But not turning on at all
> randomly seems like it might be a short.  And your mention of the heat
> (/humidity?) might support that.
> 
> You could try opening just the case (
> https://www.ifixit.com/Teardown/Apple+Tablet+Teardown/2153) to see if
> there's any very obvious oxidation on the logic board itself.
> 
> I mean... just because it's costless...  Have you tried blowing in the PC
> card slots/maybe wiping very gently with a qtip?  Have you looked in those
> slots for oxidation?
> 
> Believe it or not, "Scrubbing Bubbles" is pretty good at eating corrosion
> off of logic boards.
> 
> Good luck,
> Michael
> 
> 
>> On Tue, Sep 7, 2021, 2:09 PM Rob Moody <robmoody at fundamental-learning.com>
>> wrote:
>> 
>> Hi Michael,
>> Thanks for the tips. I have tried “pulling down” on the power switch while
>> pressing the Reset button…still nothing.
>> I have tried all combinations of power switch, reset button, battery tray
>> and power pack…to no avail! In a previous ownership of a 2000 this had
>> always worked….but this replacement unit seems totally dead!
>> 
>> Sent from my iPhone
>> 
>>>> On 7 Sep 2021, at 18:05, Michael Sheflin <sheflinm at gmail.com> wrote:
>>> 
>>> Oxidation may not be your issue,  fatal.  I've, unfortunately, had
>>> oxidation at the battery terminals in my working 2100 for years at this
>>> point.  I have not tried to clean it, though I might reconsider.
>>> 
>>> I'm not endorsing the following; I kind of doubt this will resolve
>> things,
>>> but see:  https://discussions.apple.com/thread/122311. .  Have you tried
>>> screwing with the reset button?  And have you tried screwing with the
>>> backup battery?  If there isn't one, have you tried putting one in?
>>> 
>>> Try the power button while holding rest, also.   (But don't delete your
>>> files when prompted.)
>>> 
>>> Best,
>>> Michael
>>> 
>>>> On Tue, Sep 7, 2021, 11:18 AM Rob Moody <
>> robmoody at fundamental-learning.com>
>>>> wrote:
>>>> 
>>>> Hi there Newtonians, Newt Crew….
>>>> Well, I’ve made sure that there were no PC Cards inserted (easy, as I
>>>> don’t have any!) , left the 2000 off power for a couple of days…nothing
>>>> from power supply or AA tray…I even opened up the back plate carefully
>> to
>>>> see if I could get into the battery “chamber”….and using a torch I could
>>>> see some oxidation…so I carefully brushed vinegar around the terminals
>> and
>>>> left it to dry (bit of a heat wave here at the moment!)….but still no
>>>> boot!  I didn’t want to go any further into the 2000’s innards for fear
>> of
>>>> breaking something….
>>>> Any help appreciated!
>>>> 
>>>> Sent from my iPhone
>>>> 
>>>>> On 5 Sep 2021, at 06:18, Grant Hutchinson <
>> newtontalkmessages at gmail.com>
>>>> wrote:
>>>>> 
>>>>> 
>>>>>> On Aug 31, 2021, at 5:36 AM, Rob Moody <
>>>> robmoody at fundamental-learning.com> wrote:
>>>>>> 
>>>>>> Also sent an email to Frank via his site (as he was so helpful to me
>>>>>> many years ago) but haven’t heard back…is he okay and doing well?
>>>>> 
>>>>> Hey Rob ... it’s great to see you on the list again. Sorry that you’re
>>>> having issues with your new MP2000. As far as we know, Frank is still
>>>> around and well ... just not active on the list every day.
>>>>> 
>>>>> I’m sure we’ll get you fixed up.
>>>>> 
>>>>> g.
>>>>> 
>>>>> ----------------------------------------------------------------------
>>>>> 
>>>>> Grant Hutchinson
>>>>> NewtonTalk List Dad & Interweb Custodian
>>>>> 
>>>>> 
>>>>> ----------------------------------------------------------------------
>>>>> 
>>>>> http://newtontalk.net
>>>>> http://twitter.com/newtontalk
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