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8.6 troUblESHooting - toUcH pad iSSUES
all or SoME of tHE fUnction kEyS do not rESpond
poSSiblE caUSES:
1) The touch pad is not calibrated properly.
2) The UCB is damaged.
SolUtion:
1) Perform a touch pad calibration in Service Mode:
a. Press ENTER, 3, 0, 0, 1, ENTER on the lower number keypad.
b. Press TEST on the display.
c. Press TOUCH CALIBRATION on the display.
d. Follow the cross mark moving across the screen and touch. After testing 5 positions, touch the center to exit the test (Figure A).
2) If the Touch Calibration does not work, replace the UCB.
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cHaptEr 8: troUblESHooting
figUrE a
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Troubleshooting
