Apple Self Repair Guides

Motherboard

Before you begin, remove the following:

• Main battery
• I/O door
• Top case
• RAM expansion card (if present)

• Daughterboard
• Modem board (if present)

Caution: The PowerBook 1 40/1 45/1 70 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins/Safety.

1 Caution: The hard drive, floppy drive, and thermistor cables are fragile. Handle them with care.

Lift up the locking tabs and remove the hard drive, floppy drive, and

battery thermistor cables.

2 Remove the two hex nut screws and lift the motherboard out of the bottom case.

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