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Carefully bend the door into an arch until one of the pins releases from its slot.
Once one of the pins is free, remove the I/O door from the computer.
Place your hands on the lower case, just above the I/O panel, and slowly lift the lower case a few inches above the main body of the computer.
Release the large, gray interconnect ribbon cable just behind the I/O panel.
Caution: Lower case cannot be fully removed until two plastic clips in the front corners are released. See the following step for details.
Place your thumb on the upper case, inside the empty battery slot, and your index finger near your thumb on the left side of the lower case.
Pinch your thumb and index finger towards each other to release the clip. Without releasing pressure on the pinch grip, use your index finger to push the lower case upwards.
Lift the lower case to remove it.
Locate the Modem Card on the lower case.
Use a T8 torx screwdriver to remove the two, 7.7mm long screws from the two corners.
The modem card is an optional component on the Macintosh 165c, and may not be included in all devices.
Lift the modem card directly upward until it releases from the connector.
If the modem card is difficult to remove, gently jostle it back and forth as you lift up.
Locate and lift the PSRAM expansion card vertically until connector releases.
If the PSRAM expansion card is difficult to remove, gently jostle it back and forth as you lift up.
The PSRAM expansion card is an optional component, and may not be included in all devices.
Life the daughterboard directly up to remove it from the connector.
If the daughterboard does not easily release from the connector, gently jostle it back and forth as you lift up.
Use needle nose pliers to remove the two, 5mm inch wide and 10.8mm long hex bolts from the lower left side of the motherboard.
To remove bolts with pliers, twist counter clockwise.
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