User's Manual

Take Apart Keyboard - 22
Keyboard
Before you begin, remove
the following:
• Main battery
• I/O door
• Top case
• Trackball assembly
Caution: The
PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap. Review the ESD
precautions in Bulletins/
Safety.
Keyboard