4-26 Chapter 4: Calibrating the Touch Screen
8.
Replace
the
Main
controller
Board.
When
you
replace
the
Main
controller
Board
or
re
‐
image
the
Hard
Drive,
Windows
may
display
a
dialog
box
indicating
that
the
Hardware
Calibration
Data
does
not
match
the
Windows
Registry
settings.
Answering
either
OK
or
Cancel
is
not
important,
provided
you
perform
the
25
‐
Point
Linearization
before
placing
the
terminal
back
into
service.