Model-T touchscreen is out of calibration

bmoney 2014-04-26 06:41:21 UTC #1

Under the device settings menu you may perform a three point touch-screen calibration by pressing and holding the yellow squares until they turn green when prompted, and then hit the back button when done to save the newly calibrated values.

If your Model-T is so out of calibration that you can't navigate to the touchscreen calibration menu above, factory default touchscreen calibration can be restored by pressing and holding the screen anywhere for 30 seconds and then following the directions on the screen.
NOTE: This press and hold action must be initiated within the first 30 seconds of powering on the Model-T, so you may need to power cycle the unit.

bryandhargrave 2014-05-09 01:45:49 UTC #2

this post was a massive help to me. i calibrated and at the end of the calibration the screen seemed to be totally unresponsive. i ran through this procedure and all was well. thank you so much.

bmoney 2014-05-09 03:56:37 UTC #3

For some reason people are drawn to the calibration screen. We have had lots of people with the same issue already. We are planning on making the screen harder to get to and try and make it more user friendly in a future upgrade.

What's funny is the first time we did a demo of our unit, the first guy to touch it went into the calibration screen and totally bricked it, so we looked pretty stupid for the rest of the demo, so from that we learned that we needed a way to restore the known good values. That lesson seems to be paying off!

major_error 2014-05-09 23:36:17 UTC #4

As an IT support guy, it's one of the first things I do just as a matter of course.
I managed to bodge mine because I couldn't see the color change of the second calibration point, then the third point flashed by before I could react....

2 things I can think of that might help if the hardware & software allow for it:
-add a test screen after calibration; if no touches register (or you can't click OK after 30 seconds), the calibration is dropped
-wait for no touches to be registered before moving to next calibration point.

hebnern 2014-05-10 00:27:15 UTC #5

Thanks for the input. Both of these have been implemented in the latest code, so it should be much harder to mess it up now.

coffey_ed 2014-05-20 15:52:07 UTC #6

Well I am one of the people dumb enough to get their device and try to do the touch screen calibration. I did the 30 second hold on the screen and reset the calibration and got things back to normal. Thanks for posting.

emdubeu 2014-07-23 04:06:47 UTC #7

After updating to the latest unstable huild, my screen was out of calibration. I attempted to recalibrate with the above instructions, but when I get to the screen calibration menu, I can't select the calibrate option. I've unplugged the unit almost 100 times, trying to get different results with mi success. I don't know what I can do at this point.

hebnern 2014-07-23 04:20:20 UTC #8

What does it do when you get to that screen? It should switch between the options when you touch, and then you touch and hold to activate the selected option.

emdubeu 2014-07-23 04:47:59 UTC #9

When I used the menu driven option to recalibrate (not the recovery option by touching screen for 30 seconds), sometimes I get the option to touch and hold the colorful squares. When I do get the option, I click past the first box, but it locks up on the second. It actually turns green all by itself without me touching it. It then just sits at that screen until I eventually unplug it.