Touch pad seem to be out of calibration - when you touch anywhere on the screen, it highlights about 1/2 inch above where you are pointing - very hard to enter addresses etc.
not sure what tom tom you have but try this (found in a forum)
SAW THIS IN ANOTHER FORUM - RESOLUTION TO SCREEN CALIBRATION ISSUE
So I will give it a try to help sort out a friends TomTom.
Method valid for NavCore versions until 8.051.
A manual method to correct the calibration of the touchscreen input
device of any all-in-one TomTom systems consists in creating a file
called calib.txt (e.g., with notepad) and saving it in the main
directory of the TomTom disk memory (e.g., the SD card; the same
directory of the ttsystem file).
calib.txt should include one line with four numbers separated by a space: MaxX MinX MinY MaxY
Notice that the ‘x’ sequence (max, min) is inverted than the ‘y’ sequence (min, max). MaxX > MinX and MinY < MaxY.
For instance, the file can include:
928 118 107 912
Each TomTom device has its own most appropriate sequence.
In order to compile the file with default data, one method could be to
perform a TomTom reset (or to eject the SD card), powering on the
device and holding down the ON button for a few seconds until a unit
status screen appears. The line named “Touchscreen calib. data:” will
include four numbers that in sequence represent MinX MaxX MinY MaxY;
these numbers can be used to fill the configuration line of calib.txt
remembering to swap the first two ones. For example, if the unit status
screen returns 118 928 107 912, calib.txt has to be saved with 928 118
107 912.
Tuning can then be done by adjusting these numbers until the
touchscreen is calibrated. Distortions like screen rotation, trapezium
and rhombus correction cannot be achieved with this method even if
tuning these parameters can provide an acceptable touchscreen
management even in presence of distortions; the best screen to tune the
calibration is exploiting the soft keyboard of the NavCore application.
For instance, in my old TomTom GO Classic device I realized that, after
activating the NavCore soft keyboard, when moving vertically (Y axis)
the cursor appeared calibrated, while the horizontal movements (X axis)
prevented to manage the left and right key columns (especially in the
left bottom corner positions). So, I left the last two digits unaltered
and, after some tests, I successfully used the following values: 805
200 107 912.
Method valid for NavCore versions post 8.051.
For NavCore versions 8.2x and 8.3x, use the same method as mentioned above, with these small differences:
the file should be named cal.txt (and not calib.txt) and should again
be positioned in the main directory of the SD (or HD) drive of the
TomTom system (e.g., the same directory where ttsystem can be found).
Besides, the four numbers included in the file should have a different
sequence than what previously described for versions until 8.51;
cal.txt shall include the following sequence: MaxX MinX MaxY MinY
(notice that also MaxY precedes MinY).
For instance, cal.txt could include the following four digits: 928 118 912 107
Again, these numbers are specific of each TomTom single unit.
E.g., my TomTom GO Classic correctly runs 840 245 912 107.
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