Partner Tech International PT-6900, Service Manual, Page: 61 / 106

LCD symptoms 51
LCD symptoms
Touch screen symptoms
S
YMPTOM
C
ORRECTIVE
P
ROCEDURE
LCD backlight is not working but text is
still visible onscreen 1
Reseat the LCD cable.
2
Reseat the inverter cables.
3
Replace the inverter cables.
4
Replace the inverter.
LCD backlight is working but text is not
visible onscreen 1
Reseat the LCD cable.
2
Reseat the inverter cables.
3
Replace the LCD.
LCD screen is garbled
Characters are missing pixels
Screen is distorted
Screen displays wrong color
Screen displays extra vertical/horizontal
lines
1
Reseat the LCD cable.
2
Replace the inverter cables.
3
Replace the LCD panel.
4
Replace the motherboard.
S
YMPTOM
C
ORRECTIVE
P
ROCEDURE
Touchscreen does not function
No virtual mouse
Cursor doesn’t follow when touching the
screen
1
Install and run the touchscreen calibration program from
the driver CD.
2
Remove and reinstall the USB driver.
3
Reseat the panel cable.
4
Reseat the touchscreen board-to-touch panel cable.
5
Replace the touch control board.
6
Replace the touch panel.