Imac G3 Model M4984 Logic Board Replacement Repair Guide

Difficulty

Easy

Steps

Time Required

                          20 minutes - 1 hour

Sections

Logic Board
8 steps

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BackiMac G3 Model M4984
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Introduction

The iMac G3 was Apple’s new G3 all-in-one. It had tons of new features, and removed all old interfaces. It was released in 1998, and sported a 266Mhz, or 333Mhz PowerPC G3. It also came in five colors: tangerine, blueberry, lime, grape, and strawberry. These were known as the “5 Flavors.”

What you need

Step 1

              Logic Board

The iMac G3. This was a great computer for the time, and had plenty of features.

The iMac G3. This was a great computer for the time, and had plenty of features.

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Step 2

Start by flipping the iMac upside-down. It may help to lay it on a towel, so you don’t damage the screen, or scratch the face.

Start by flipping the iMac upside-down. It may help to lay it on a towel, so you don’t damage the screen, or scratch the face.

Step 3

Remove this Phillips screw.
Using a flathead screwdriver, work your way around the bottom cover, until it comes off.
Then, lift the bottom cover up and out, and set it aside.

Remove this Phillips screw.

Using a flathead screwdriver, work your way around the bottom cover, until it comes off.

Then, lift the bottom cover up and out, and set it aside.

Step 4

Now, remove the DB-15 Video connector from the logic board.
It may be helpful to use a Phillips screwdriver to remove the thumbscrews.

Now, remove the DB-15 Video connector from the logic board.

It may be helpful to use a Phillips screwdriver to remove the thumbscrews.

Step 5

Remove the power cable from the logic board assembly.

Remove the power cable from the logic board assembly.

Step 6

Remove the front panel connector. (You may also need to remove an additional screw that connects the front panel connector to the logic board assembly).

Remove the front panel connector. (You may also need to remove an additional screw that connects the front panel connector to the logic board assembly).

Step 7

Now, remove these Phillips screws.
Now, grab the logic board assembly by the piece of plastic, and lift it out.

Now, remove these Phillips screws.

Now, grab the logic board assembly by the piece of plastic, and lift it out.

Step 8

The logic board assembly. This is the heart of the computer, it contains the motherboard, CPU, RAM, V-RAM, PRAM battery, the hard drive, and the optical drive.

The logic board assembly. This is the heart of the computer, it contains the motherboard, CPU, RAM, V-RAM, PRAM battery, the hard drive, and the optical drive.

To reassemble your device, follow these instructions in reverse order.

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                    Chris Green

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Nicolas Zbinden - Oct 20, 2015

Just did this on my Grape 333 Mhz and on my Lime 333 Mhz which come from from the same place. Actually, I’m surprised that the Grape’s logic board has a white IrDA connector which its twin doesn’t have…

Introduction#

What you need#

Team#

Introduction

What you need

Team