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The touch screen membrane is made up of two layers one controls the left to right axes and the other the up and down axes with the small ribbon cable in the middle, i cant remember of hand which is which now but you get the gist, there is a fine track going around the surrounds which keep the two together and it somtimes comes slightly unstuck, a quick tip is to run the stylus around the screen applying a bit of pressure somtimes this helps to make the screen more responsive, give it a try and then recalabrate it if you still have the same problem try taking the battery out and reseting the ds and calabrate it. Worst case the touch screen may need replaceing. i hope this helps.
if the touch screen feature is not working, and you cant navigate to the calibrate screen, push the off switch but release right away, so it dont turn off, it will bring up the calibrate operation, its a default to access the calibrate when you cant navigate the screens.
Unscrew the 4 torx screws on the back and remove the cover carefully.
Unplug the battery for 30 seconds. plug it back in and re- assemble the unit. Once it comes back on it will give you the chance to re calibrate the digitizer ( or you can now select it from the prefs menu)
If the touchscreen fails to repsond you will need a new digitizer.
You can purchase it from :
My suggestion if you have Sprint, go to their corporate store. They charged me $35 for a new phone. I did not have their $7 a month warrenty... but I do now. The only thing they will not do is replace the phone if it was in water.
Try soft reseting your phone. If that doesnt work then try hard reseting. To soft reset take the stylus pen and push in the little hole on the bottom of the phone. You should feel a little click and then your phone will restart. Wait until your phone starts up again and if it still isnt working then do a hard reset.
To hard reset, hold down the green send button and the red end call button at the same time and continue to hold them down as you then push your stylus pen into the hole on the bottom of the phone untill you feel the little click. Your phone should start to reset. Be warned you will loose any information saved to the phones memory ie: phone numbers, pictures, personal settings. Anything saved to your memory card should be ok.
If your screen remains blank after trying both resets I would suggest taking it back to where you got it and and have them fix it or replace it.
Hope this is helpful.
Solved same problem.
Same model ipaq 1940.
Sorry for my bad english;this is what You can do:
Open the ipaq
Remove the mainboard
My problem was the connection between LCD and Touchscreen.
So I solved putting on the connection 3cm of tape to have a fully
working contact.Indeed, the lower part of cable, with the 2 little
holes was disconnected.
After this all becames to life!
I hope helps!
In italiano: 3 cm di nastro adesivo fra LCD e touchscreen.Il loro
contatto non era perfetto.Ora tutto funziona.Con un po' di manualità si
riesce a fare senza problemi!
Haha I love the Centro. You need to perform a system reset to the phone the directions are in your manual. Basically, the touch screen is screwed and by reseting it and following the prompts that should resolve your issue. You don't lose any information either so you have nothing to lose.