[NTLK] Touch screen stopped working

Ian Finder ian.finder at gmail.com
Wed Feb 8 22:21:02 EST 2017

Thanks for the tips, Frank.

I'll go thru this list tomorrow.
It's not (1) (2) (3).

I worry that the digitizer ribbon may be damaged in a not-so-obvious way
given what condition the port door was in.

I'll bust out my loupe to verify.


- Ian

On Wed, Feb 8, 2017 at 16:24 NewtonTalk <newtontalk at pda-soft.de> wrote:

> Check the following issues in the order mentioned:
> 1) Try tapping way off where you actually want to tap. Sometimes the
> alignment is very poor. In very rare cases this can help to get into the
> alignment screen, which can fix things.
> 1) The black thingie that the stylus lives in is attached to the case
> through holes in the mainboard via 4 small golden screws. The upper two
> screws are also required to press the digitizer cable to the contacts on
> the
> mainboard.
> 2) There ought to be a rectangular silicone part below the digitizer cable
> contacts. If this part is missing, the digitizer cable will not be
> sufficiently pressed to the mainboard even if the screws mentioned above
> are
> in place, resulting in flaky behavior.
> 3) Make sure the digitizer cable is positioned correctly. It has two tiny
> holes next to the contacts that are supposed to fix the cable position. The
> case has two tiny pins that should be in the holes.
> 4) I know you already did, but clean both the mainboard and the cable
> contacts again with alcohol.
> 5) Check not only the contacts, but the whole cable from both sides with a
> strong magnifying glass or (better) a microscope. I have had dead
> digitizers
> where the fault was only visible under a microscope.
> 7) Try your luck without the bezel. Sometimes a digitizer is unwilling to
> work because it thinks it is already tapped somewhere close to where it
> touches the bezel. This can sometimes be fixed by thoroughly cleaning both
> the bezel and the area where it touches the digitizer.
> 8) If you can, try the digitizer temporarily in another Newton. I could do
> this for you, but since I live in Germany, the cost of shipping might be an
> issue.
> Good luck!
> Frank
> -- Newton software and hardware at http://www.pda-soft.de
> ----------------------------------------------------------------------
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   Ian Finder
   (206) 395-MIPS
   ian.finder at gmail.com

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