Introduction

I will teach you how to replace the motherboard

Image 1/3: Take out the power lead Image 2/3: Prepare two screw drivers; T10 and Phillips (T15 may be used in some instances) Image 3/3: Open the case by pulling the lock
  • 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

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Image 1/1:
  • Remove the major fan located on the left side of the processor

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Image 1/2: Pull it carefully Image 2/2: There are two connections, which are needed to be disconnected (second image)
  • 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)

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Image 1/2: Remove RAM Image 2/2: Remove RAM
  • Remove the graphics card

  • Remove RAM

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Image 1/3: The cover is attached to four pins. In order to remove the cover, it has to be pulled towards the left. Image 2/3: ++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 Image 3/3: It can also be pushed from the inside (by lifting the bottom of the cover first) (see image 3)
  • 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)

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Image 1/3: It should look like this (image 1) when the cover has been removed. Image 2/3: Remove 8 screws shown on Image 2 and 3 (use T10 and T15 screw drivers) Image 3/3: The processor should now come out
  • 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

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Image 1/3: Locate the side fan (right wall), push the pins and pull the fan Image 2/3: Disconnect the fan cable (red square) and the rest of yellows if possible Image 3/3: Disconnect the fan cable (red square) and the rest of yellows if possible
  • 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

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Image 1/3: 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 Image 2/3: 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 Image 3/3: 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
  • 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

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Image 1/3: Remove the connectors (as shown on image 2 and 3) Image 2/3: Remove the connectors (as shown on image 2 and 3) Image 3/3: Remove the connectors (as shown on image 2 and 3)
  • 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)

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Image 1/3: Remove them and pull the Power Supply. Image 2/3: Disconnect the connector from the power supply (image 3, hdd lead) Image 3/3: Disconnect the connector from the power supply (image 3, hdd lead)
  • 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)

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Image 1/3: The Red are small black screws shown on the second image Image 2/3: The processor holding screws are marked as yellow and have to be removed Image 3/3: Green- pins which hold the motherboard in place
  • 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.

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Image 1/2: Hope you enjoyed it, Michal Scrumpymacs Image 2/2: Hope you enjoyed it, Michal Scrumpymacs
  • The motherboard should now come out freely

  • Hope you enjoyed it, Michal Scrumpymacs

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Conclusion

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

31 other people completed this guide.

Michal

Member since: 01/26/2012

1,066 Reputation

1 Guide authored

3 Comments

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

Hi,

Thanks for a great guide.

I am tearing down my Mac G5 tower (air cooled) to use the casing for a new home build.

I am currently struggling with the CPU brackets and the bolts fixing it. It seems to be some kind of "wonder"-screws that no of my screwdrivers nor bits are able to handle. Im actually considering just ripping the whole thing, even though I might damage the case and other components which I might want to keep to my build.

If you have any thoughts on how to get around this, please leave a comment.

Best regards

Mark.

Markus Forsberg - Reply

@Markus Forsberg:

I think you mean the hexagonally-screws to get off the CPU with the cooling fins. For those you will need an allen wrench with 2.5mm. To get at the two screws in the round hole of the middle from the cooling fins you will need an extra long allen wrench (minimum 16cm or longer).

The other screws at the CPU brackets are called torx screws (looks like nearly a star or something like that)

Hope it will help you.

Best regards

Sven - Reply

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