
 
 Take Apart Top Case - 7
 
Top Case
 
Before you begin, remove 
the following:
• Main battery
• I/O door
 
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.
Top Case