iMac G4 17 800 MHz EMC 1936 PRAM Battery Replacement

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Jan 11, 2019 - 02:01:33

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Introduction

Removing an old or broken PRAM battery.

What you need

Step 1 Bottom Plate

iMac G4 17 800 MHz EMC 1936 PRAM Battery Replacement, Bottom Plate: step 1, image 1 of 1

Unplug all the cables from the computer, including the power cable. Lay the computer face-down, supporting the neck and base with a soft cloth under the screen.

Step 2

Loosen the four Phillips #0 screws.

Step 3

Carefully remove the base access panel.

Step 4 Bottom Plate Housing

iMac G4 17 800 MHz EMC 1936 PRAM Battery Replacement, Bottom Plate Housing: step 4, image 1 of 2

iMac G4 17 800 MHz EMC 1936 PRAM Battery Replacement, Bottom Plate Housing: step 4, image 2 of 2

Remove the four 25mm T-15 screws.

Step 5

Open the housing plate.
Be gentle with the wires still connected to the logic board so as not to ruin the cables.
A fixed plug connector between the logic board and upper unit will cause some resistance. Pull gently but firmly.

Step 6 PRAM Battery

iMac G4 17 800 MHz EMC 1936 PRAM Battery Replacement, PRAM Battery: step 6, image 1 of 2

iMac G4 17 800 MHz EMC 1936 PRAM Battery Replacement, PRAM Battery: step 6, image 2 of 2

Gently remove the battery from its holder using the plastic opening tool.
Insert new battery.
Clean and re-apply thermal paste to the heat sink areas circled in Yellow. See Step 15 in iMac G4 17" Model M9168LLA Hard Drive Replacement for better photos and description.