Introduzione

The Power Mac G4 MDD Uses two system fans, an optical fan (for the optical drives), and a main system fan (cools the CPU, the hard drives, and the graphics card).

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The Power Mac G4 MDD: the last, and the fastest G4-based Mac.  This computer boasted up to a Dual 1.42GHz PowerPC G4 CPU (though I have a single 1.25GHz).
  • The Power Mac G4 MDD: the last, and the fastest G4-based Mac. This computer boasted up to a Dual 1.42GHz PowerPC G4 CPU (though I have a single 1.25GHz).

  • Six USB ports.

  • Four FireWire ports.

  • Assorted SCSI (SCSI50/SCSI68)

  • Assorted Audio

  • Video (ADC & DVI)

  • Networking (RJ-45 Ethernet/56k Modem)

  • Some later model MDD's (such as the dual 1.42GHz) Have a FireWire 800 Port Here:

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Pull on the side lever and lower the side of the case.
  • Pull on the side lever and lower the side of the case.

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  • The hard drive cages are located here.

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  • Cage 1

  • Start by removing this screw.

  • Remove the IDE ribbon cable from the motherboard.

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  • Now, remove the power connecton from the drives.

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  • Now, push this tab down, and pull the cage towared you.

  • Now, you can set cage 1 aside.

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  • Cage 2:

  • Remove this Phillips screw:

  • Disconnect this IDE ribbon cable from the logic board.

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  • It's likely that there is a cable clip holding the ribbon cable to the case.

  • To remove it, push the end, and it should pop up.

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  • With the clip free, pull on this tab, lift the cage up, until it clicks, and pull it away.

  • Now, set the cage on top of the CPU, and remove the power connectors.

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  • Once the cables are free, set the drive cage aside.

  • To remove the hard drives from the cages, remove the four screws on the sides of the cage that are connected to the drives, than slide the drives out.

  • The two cages are cross compatible and can be put in either rack.

  • The MDD does not have a 128GB drive limit like older macs, My MDD has 3 Drives (A 400GB Hitatchi Deskstar, 40GB Seagate Baracuda 7200.7, and a 30GB Quantum Fireball LCT).

  • Note the ID jumpers on the two drive set. One is set to Master, the other to slave. A single drive can be set to Cable Select.

Thanks - excellent tutorial!

Question: If you have a single internal drive, and a connected extrenal drive via firewire or usb, what jumper setting should be set for the internal drive and the external drive? Booting into Mac OS 9 natively (not via Classic) on the internal drive seems to be sensitive to the jumper settings and I’m having issues getting it to work.

LTG Seb - Replica

I ran my MDD with 3-750GB IDE HD’s. When they got flakey I replaced them with 2TB SATA drives in the back cage with a cheap SATA to PATA adapter and they formatted out to 1.8TB. I then cloned (CCC) the boot drive to one of the 1.8TB drives. It boots to the new drive and every thing seems to operate like normal. I don’t know how big we can go but we know that a MDD will handle at least 2TB HD’s and I have 5TB in my iMac 15,1

Glenn Stettler - Replica

  • Start removing the optical drive cage by removing the back cover.

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  • Now, remove the IDE and power cables.

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  • Remove these two Phillips screws:

  • Now, pull the cage away from the front until it is free.

  • Now, lift the cage out.

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  • To remove the drive from the cage, remove the four screws on the side of the drive, and pull the drive out of the cage.

  • My MDD has a 3rd Party 22X SuperDrive, for burning DVD's in Leopard (Thank You Generic Drive Support!)

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  • Optical Fan:

  • Remove these two Phillips screws:

  • Now, slide the plate towards the case, and lift it up, and off.

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  • Once the cover is removed, disconnect the power cable and thread it under the dust shield.

  • Now, lift the fan straight up and out.

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  • System Fan:

  • Disconnect the optical drive IDE cable from the logic board.

  • Now, remove the system fan cable.

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  • Now, grab the system fan by the sides and pull it up, it should come free, the system fan is very large and loud, compared to standard sized fans.

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Conclusione

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

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Chris Green

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Das waren halt noch service- und support-freundliche Macs …

office - Replica

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