IMac G4 20"

For more information, see this article's corresponding Wikipedia page: iMac G4.

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

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.

iMac G4 20"

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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/dvd drive unit doesn’t 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

• Videos or other things that might be helpful to check out