Introduction

Replace the optical drive in your iMac G4 15".

Place the computer monitor face down on a safe, harmless surface. Using a  Phillips #00 screw driver, remove the four 6.86 mm screws from the metal plate.
  • Place the computer monitor face down on a safe, harmless surface.

  • Using a Phillips #00 screw driver, remove the four 6.86 mm screws from the metal plate.

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Remove the metal plate from bottom of the iMac G4.
  • Remove the metal plate from bottom of the iMac G4.

  • The four screws do not completely separate from the metal plate.

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Use a spudger to lift and remove the AirPort's antenna connector.
  • Use a spudger to lift and remove the AirPort's antenna connector.

  • This step is only applicable to iMacs that came with an AirPort card installed.

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Release the tabs on each side of the module by simultaneously pushing each tab away from the RAM. These tabs lock the module in place and releasing them will cause the module to "pop" up.
  • Release the tabs on each side of the module by simultaneously pushing each tab away from the RAM.

  • These tabs lock the module in place and releasing them will cause the module to "pop" up.

  • Remove the RAM module from the iMac.

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Remove the four  28.07mm Torx #15 screws from the lower case.
  • Remove the four 28.07mm Torx #15 screws from the lower case.

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Open the base by carefully pulling straight off, do not rotate the cover. Open slowly to ensure that no cables are damaged or disconnected.
  • Open the base by carefully pulling straight off, do not rotate the cover.

  • Open slowly to ensure that no cables are damaged or disconnected.

You can skip steps 7-9; there is no need to disconnect any internal wiring or RAM. Crack open the base a couple of inches (it doesn't really rotate, just pull it out), and the PRAM battery will be right under your nose. It's no problem to pop it out with your fingers and put the new one in. Just make sure that you note the positive and negative terminals on the old one, and put the new one in the same way.

whshep - Reply

No one mentioned the need for thermal paste in the reassembly...

Federico Jimenez -

Thermal paste? Where would you put that? As I understand it there's no need for that anywhere other than the CPU/Heatsync

Steven Hatch -

There's a post (or block really) that connects the cpu heatsink to the upper part of the metal shell that is just to the right (facing the imac) of the drive door. Upon reassembly it's best to clean the matching surfaces and reapply thermal paste to that upper post.

Joe Pena -

what's with the apparent loose black wire visible in step 6 & 7 ?? same as the loose wire just sitting there in step 3 ( which was like that on mine, just loose.....? )

rickcee44 - Reply

I hear that wire is bluetooth hook up.. my model has the other side but my board doesn't have the hook up... go fig :(

sean -

Squeeze the small black tab and wiggle gently to remove the colored power cable.
  • Squeeze the small black tab and wiggle gently to remove the colored power cable.

  • Do not pull directly on the colored wires.

  • Do not remove black grounding wire.

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Grab both sides of the blue connector and firmly pull to remove it from the mother board.
  • Grab both sides of the blue connector and firmly pull to remove it from the mother board.

  • Do not pull directly on the ribbon cable.

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Using a Torx #9 screw driver, remove the two 8.77mm screws holding the drive's shield onto your iMac G4. Remove the drive shield from your iMac.
  • Using a Torx #9 screw driver, remove the two 8.77mm screws holding the drive's shield onto your iMac G4.

  • Remove the drive shield from your iMac.

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Using a Torx # 10 screw driver, remove the four 19.12mm screws that mount the optical drive.
  • Using a Torx # 10 screw driver, remove the four 19.12mm screws that mount the optical drive.

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Grasp the HD/Optical Drive bundle by the by the sides and gently wiggle it loose from the sides.
  • Grasp the HD/Optical Drive bundle by the by the sides and gently wiggle it loose from the sides.

  • Ensure there are no wires passing over the top of the drive bundle when removing it, as it may unintentionally disconnect something.

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Unplug the power source from the optical drive by pinching the plastic base of the connector and wiggling it gently.
  • Unplug the power source from the optical drive by pinching the plastic base of the connector and wiggling it gently.

  • Do not use excessive force, or pull on the wires directly, in order to unplug the connector from the drive.

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Unplug the ribbon cable from the optical drive by grasping the plastic base of the connector and wiggling it gently.
  • Unplug the ribbon cable from the optical drive by grasping the plastic base of the connector and wiggling it gently.

  • Do not pull on the ribbon cable directly.

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Remove the four 6.75mm Torx # 10 screws mounting the drive.
  • Remove the four 6.75mm Torx # 10 screws mounting the drive.

  • There are two screws on both sides of drive mount.

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Slide the optical drive out from the metal support mounted to hard drive.
  • Slide the optical drive out from the metal support mounted to hard drive.

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Conclusion

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

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Ryan Kozak

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Cal Poly, Team 5-32, Amido Fall 2011 Member of Cal Poly, Team 5-32, Amido Fall 2011

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