Logic Board

Before you begin, remove the following:

  • Rear cover
  • Main battery
  • Keyboard cover
  • Display assembly
  • Keyboard
  • Trackball/numeric keypad
  • All option cards

Caution: Review the ESD precautions in Bulletins/ Safety.

Caution: Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage any modules.

Outline of Logic Board —

1 Disconnect the following cable connectors from the logic board:

  • Input device cable from J1 3
  • Input device cable from J20
  • Battery cable from J1 7
  • Hard drive cable from J1 8
  • Lower floppy drive cable from J1 4
  • Upper floppy drive cable from J1 5
  • Speaker cable from J1 6

Take Apart

Caution: Do not lift the subframe too far. Lifting too far puts excess strain on the subframe and logic board and could damage both.

2 Using a flat-blade screwdriver, pull the latch from the subframe. When the latch is clear, lift the left side of the frame.

Right

Subframe

Latch

Right

Subframe

Latch

Hold the left side of the subframe up—far enough to keep it from being held by the clip—and press in the clip at the right front of the subframe. Lift the subframe a little further.

Using a flat-blade screwdriver, release the plastic latch at the right side of the subframe.

Subframe (Upside Down)

To remove the subframe from the bottom case, lift the front of the subframe and pull it toward you.

Place the subframe upside down.

Logic Board

Typical Securing Clip

Release each of the plastic clips that secure the logic board to the subframe. Release the clips in the order shown. As you release each clip, gently lift the logic board and proceed to the next clip.

Remove the logic board from the subframe.

Û Service Source

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