Texas Instruments 51X - Manual (Page 71)

c Caution: If the notebook is powered up with the LCD bezel removed,
you can be exposed to high voltages which could result in shock and
equipment damage. Ensure that the batteries and AC adapter are re-
moved from the notebook when working on the LCD/Display assembly.
1. Use a narrow piece of plastic or pointed tweezers to apply light
pressure to one edge of the lower screw covers. The lower screw
covers will bow outward and can be removed.
2. Remove the rubber upper screw covers using a pair of tweezers.
3. Remove the six screws that secure the bezel to the display assembly (a
small Phillips-head screwdriver is recommended for removing the two
screws at the top of the bezel).
4. Pull on the inside edges of the bezel; remove bezel and lay aside for
later reinstallation.
5. Peel back the EMI shield along the right side of the display to expose
the Inverter Board and the Contrast Board.
6. Disconnect the connectors at the top and bottom of the Inverter Board
and/or Contrast Board.
7. Use the small Phillips-head screwdriver to remove the two screws
holding the Inverter Board or Contrast Board; remove the Board
Assembly.
8. Reinstallation of the Inverter or Contrast Board is the reverse of Steps
1 through 7 above.
6.5.10
Removing/Replacing the Touchpad Assembly
To remove and replace the Touchpad Assembly, perform the following
procedure:
1. Remove the Upper Case Assembly as described in Paragraph 6.5.4.
2. Turn the Upper Case Assembly over and remove the four screws that
secure a metal shield to the plastics.
3. Lift the plastic frame that rests on top of the touchpad.
4. Unplug the flex cable from the connector on the touchpad. Note that
the board connector is a LIF (Low insertion force) type; the cable is
held in place by friction.
5. Slide the board assembly to the right and remove from the unit.
6. Replacement of the Touchpad Board Assembly is essentially the
reverse of Steps 1 through 5 above.
6-14 Field Service