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This guide will help you in disassembling the power supply from your PowerMac.

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  1. Power Mac G4 M5183 Power Supply Replacement, Opening PowerMac G4 M5183 Case: step 1, image 1 of 2 Power Mac G4 M5183 Power Supply Replacement, Opening PowerMac G4 M5183 Case: step 1, image 2 of 2
    • Pull on outer latch.

    • Lower door until it is level with your work surface.

    • Before working on the computer make sure it is not plugged into a power supply, then touch a metal object. This discharges static electricity, which could damage the computer.

  2. Power Mac G4 M5183 Power Supply Replacement, Main Fan: step 2, image 1 of 2 Power Mac G4 M5183 Power Supply Replacement, Main Fan: step 2, image 2 of 2
    • Remove the screw from each of the two niches on lower part of fan using the Phillips #1 screwdriver.

    • The fan housing will still be connected to the computer by a power cable which will be removed in the next step.

  3. Power Mac G4 M5183 Power Supply Replacement: step 3, image 1 of 1
    • Remove the power cable from the fan and detach bracing.

  4. Power Mac G4 M5183 Power Supply Replacement, DVD-ROM Drive: step 4, image 1 of 2 Power Mac G4 M5183 Power Supply Replacement, DVD-ROM Drive: step 4, image 2 of 2
    • Removing the faceplate.

    • On the inside of the case, find the two plastic tabs.

    • While depressing the tabs, remove the faceplate by pulling and rotating outward.

  5. Power Mac G4 M5183 Power Supply Replacement: step 5, image 1 of 1
    • Remove the two screws on the front of the drive with the Phillips #1 screwdriver.

  6. Power Mac G4 M5183 Power Supply Replacement: step 6, image 1 of 3 Power Mac G4 M5183 Power Supply Replacement: step 6, image 2 of 3 Power Mac G4 M5183 Power Supply Replacement: step 6, image 3 of 3
    • Pull the drive out to allow access to the power and ribbon cables. Do not fully remove.

    • Remove both the power and ribbon cable.

  7. Power Mac G4 M5183 Power Supply Replacement, Power Supply: step 7, image 1 of 2 Power Mac G4 M5183 Power Supply Replacement, Power Supply: step 7, image 2 of 2
    • Remove the 3 hex screws on the back of the case.

    • Remove the single screw on the side of the power supply casing with the Phillips #1 screwdriver.

  8. Power Mac G4 M5183 Power Supply Replacement: step 8, image 1 of 2 Power Mac G4 M5183 Power Supply Replacement: step 8, image 2 of 2
    • Remove power cable from the logic board.

    • Remove power cable from hard drive.

    • Pull the power supply out and towards yourself.

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Justin Petrilli

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Cal Poly, Team 13-24, Maness Winter 2010 crwdns2886886:0Cal Poly, Team 13-24, Maness Winter 2010crwdne2886886:0

CPSU-MANESS-W10S13G24

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Had a nearby lightning strike, "scrammed" my Mac, but couldn't start it up afterwards. Google led me to the ifixit site ( where I should have gone first!) and your instructions got me going again. Granted, I had an identical, spare Macintosh so I was able to pull that power supply to replace the damaged one and not have to wait for a replacement, but your step-by-step made the swap fairly easy! Thank you! I am happy tonight!

Now to order the replacement.

Bill Pitts - crwdns2853112:0crwdne2853112:0

ditto…. like Bill I had a faithful G4 i use to archive some old OS9 files that need specific software that never went to OS X and some very basic Apache web server stuff. Mostly sleeping it went pop one day, I had replaced it a few years previously after a pram issue with a clean SH unit which i just swopped drives over, so getting sleeping beauty down from attic, following instructions I removed the power pac and in 30 minus the dead mac was running again and archive is protected

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