IMac G4 20"

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This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables Capacitor undo icon progressive.svg
This device is in the WorkNeeded:ReplacementParts category because it was flagged as missing information on replacement parts. If it has the original parts listed you may be able to search for replacements using the parametric searches available from parts distributors. If you have or make a list of replacement parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables Capacitor lookup icon progressive.svg
This device is in the WorkNeeded:General category because it was flagged as missing general information about the device. The information may be incomplete, using default text, or inaccurate and should be verified with external sources if possible. If you can add or correct information on this page, please feel free to edit it and do so. OOjs UI icon information-yellow.svg
iMac G4 20"
Preliminary Information
Release Year 2003
Leak Risk High
Batteries 3.6v PRAM Battery
Mounting Technology Through Hole, SMD, BGA, Sockets
Capacitor Types Aluminum Electrolytic
Destructive Entry No

Known Issues

Symptom or Problem Encountered

Causes

  • Bad capacitors on the power supply
  • Symptoms may be the iMac does not turn on at all or turns on once in awhile after spamming the power button.

Solutions

  • Recap the power supply

Disassembly Notes

I recommend following a guide from online like iFixit. One tip is if the hard drive and dvd drives come out, unscrew the DVD drive and slide it back and they should both slide out easily.

Original Parts

iMac G4 20" Power Supply

Important Note: I did not record the capacitor locations on the power supply, I also did not replace them all, but have their values and sizes, so please confirm where each capacitor goes when you are replacing yours. So take note what value of capacitor goes where when you are removing them.

Capacitor Specifications and Footprint Information
Qty Capacitance Voltage Diameter/Size Height
2 2700 µF 16 0.5" 1.1"
1 1000 µF 25 0.256" 0.48"
1 560 µF 50 0.514" 0.972"
1 120 µF 50 0.32" 0.637"
1 1000 µF 16 0.32" 0.755"

Replacement Parts

iMac G4 20" Power Supply

Capacitor replacements are in the same order here as the originals above.

Capacitors
Qty Compatible Part Number Order Links
2 EEU-FK1C272 DigiKey Mouser
1 25ZLS1000MEFC10X20 DigiKey
1 50ZLH560MEFC12.5X25 DigiKey
1 50ZLJ120M8X16 DigiKey
1 16ZLJ1000MCE10X16 DigiKey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Related Links

References