RAM Expansion Cards

Before you begin, remove the following:

  • Main battery
  • I/O door
  • Top case

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

J1 Connector J

Caution: Handle the RAM expansion card by the edges only. Do not touch any components on the card.

Caution: An incorrectly installed RAM card could damage the daughterboard. Note that the J1 connector and the RAM card are keyed for proper installation. Do not force the card into the connector, thereby defeating the key.

Caution: When installing the RAM expansion card, press down on the edge of the card directly above the connector. Be careful not to apply pressure to any components or you may permanently damage the card.

Connect the RAM expansion card to the expansion connector(J1) on the daughterboard.

Note: To verify that the upgrade is successful, check the Total Memory message (for systems with virtual memory switched off) or the Built-in Memory message (for systems with virtual memory switched on). The memory size should be 2 MB of soldered RAM plus the RAM on the expansion board. If the memory size is incorrect, replace the RAM expansion card. If the memory size is still incorrect, send the computer to Apple.

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