Disassembling Power Mac G5 Motherboard

Member-Contributed Guide

Member-Contributed Guide

An awesome member of our community made this guide. It is not managed by iFixit staff.

This is a step by step guide.

  • Author: Michal
  • Time required: 30-40minutes
  • Difficulty: Moderate

I will teach you how to replace the motherboard

Edit Step 1 Motherboard  ¶ 

Image #1

Edit Step 1 Motherboard  ¶ 

  • Place your g5 on a suitable surface

  • Take out the power lead

  • Prepare two screw drivers; T10 and Phillips (T15 may be used in some instances)

  • Open the case by pulling the lock

  • Take out the plastic cover

Edit Step 2  ¶ 

Image #1

Edit Step 2  ¶ 

  • Remove the major fan located on the left side of the processor

Edit Step 3  ¶ 

Image #1

Edit Step 3  ¶ 

  • Locate a small fan containing a speaker on the upper left corner of the motherboard.

  • Pull it carefully

  • There are two connections, which are needed to be disconnected (second image)

Edit Step 4  ¶ 

Image #1

Edit Step 4  ¶ 

  • Remove the graphics card

  • Remove RAM

Edit Step 5  ¶ 

Image #1

Edit Step 5  ¶ 

  • Step 5 is about removing the cover which protects the processor from any outside damage

  • The cover is attached to four pins. In order to remove the cover, it has to be pulled towards the left.

  • CAUTION: There may be a plastic (rubber) pin (see Image 2), which was put in place for guarantee purposes, therefore before sliding the panel, you should locate and remove this pin

  • It can also be pushed from the inside (by lifting the bottom of the cover first) (see image 3)

Edit Step 6  ¶ 

Image #1

Edit Step 6  ¶ 

  • The next two steps will demonstrate how to remove the processor

  • It should look like this (image 1) when the cover has been removed.

  • Remove 8 screws shown on Image 2 and 3 (use T10 and T15 screw drivers)

  • The processor should now come out

Edit Step 7  ¶ 

Image #1

Edit Step 7  ¶ 

  • Disconnect the cable connected to the processor

  • Locate the side fan (right wall), push the pins and pull the fan

  • Disconnect the fan cable (red square) and the rest of yellows if possible

Edit Step 8  ¶ 

Image #1

Edit Step 8  ¶ 

  • Unscrew two phillips screws located on the bottom power supply cover

  • Remove the bottom screws which held the processor in place (four in total). This will help to take the cover out without damaging the motherboard

Edit Step 9  ¶ 

Image #1

Edit Step 9  ¶ 

  • The cover should now come out. It will require some bending and pay attention to the motherboard while performing this task.

  • Remove the connectors (as shown on image 2 and 3)

Edit Step 10  ¶ 

Image #1

Edit Step 10  ¶ 

  • Locate four phillips screws on the bottom of the g5

  • Remove them and pull the Power Supply.

  • Disconnect the connector from the power supply (image 3, hdd lead)

Edit Step 11  ¶ 

Image #1

Edit Step 11  ¶ 

  • Remove Red and Yellow marked screws

  • The Red are small black screws shown on the second image

  • The processor holding screws are marked as yellow and have to be removed

  • Green- pins which hold the motherboard in place

  • In order to remove the motherboard, pull it (as shown on the third image) It should now slide on the pins which are marked as green.

Edit Step 12  ¶ 

Image #1

Edit Step 12  ¶ 

  • The motherboard should now come out freely

  • Hope you enjoyed it, Michal Scrumpymacs

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

For more information, check out the Power Mac G5 device page.

Required Tools

Phillips #1 Screwdriver

$5.95 · 50+ In stock

TR10 Torx Security Screwdriver

$1.95 · 50+ In stock

T15 Torx Screwdriver

$7.95 · 7 In stock

Recommended Tools

54 Bit Driver Kit

$24.95 · 50+ In stock

Magnetic Project Mat

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Pro Tech Screwdriver Set

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Comments Comments are onturn off

This guide applies, it seems, to liquid-cooled CPU G5s, which are rather rarity IMO.

Air-cooled G5s are completly different kettle of fish, and they come in two flavours as far as CPUs brackets (those studs on which CPUs are attached to the aluminum case) are concerned. One uses phillips screws and some guiding rods (AFAIR) - plain and simple solution, while the other uses allen bolts and sort of "expanding" studs, which have tendency to get stuck, PERMANENTLY, to the CPU's base plate. Which means, in turn, that you can easily tear them completelly off their sockets (weak and shallow ones) while attempting to lift the CPU.

Besides, the whole thing (getting the MB out) is exercise in high dexterity and saintly patience thanks to Apple's decision to save few cents on machines costing thousands of $ by making all wires shorter than necessary for easy dismantling, by an inch. Bunch of smart-!@# morons, if you'd ask me... and this is not the only issue with these machines (which are otherwise great computers).

da Cat, · Reply

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