1. Verify that the system is eligible for the REP program.
Note: iMac G5 first-generation 20-inch iMac G5 models that have previously had a replacement PFC 100-240VAC power supply installed and now experience symptoms covered by the iMac G5 Repair Extension Program for Power Supply Issues may be eligible for a repair extension if the criteria provided in this document are met Refer to the Amendment attached to the REP document at the beginning of this manual.
Note: A power supply failure may leave a visible residue on the rear cover, logic board, and the chassis. The residue does not affect the operation of the iMac G5 and can be left in place. If desired, the residue on the rear cover can usually be removed using a lightly dampened disposable cloth. Be sure to thoroughly dry the rear cover before reinstalling it.
Replace the power supply if it meets the criteria mentioned above. Refer to the next topic in this section, Special CompTIA Codes, for repair coverage information.
Note: Effective today, these power supply replacements will be excluded from Service Excellence measurement (in applicable regions). In addition, all firstgeneration iMac G5 power supplies are no longer available as Do-It-Yourself (DIY) parts.
Warning: Use caution when handling failed electronic components, and be sure to wash your hands afterwards.
8. While doing the power supply repair, inspect the capacitors (highlighted below) on the logic board, looking for signs of bulging and/or venting.
9. Affected capacitors will have a "+" sign stamped into the top of the capacitor. Note: Not all capacitors stamped with a "+" sign are faulty, so further inspection is required to determine whether one or more of the capacitors are faulty.
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10. Failed capacitors will no longer have a flat top and can be identified by signs of bulging (shown below) and/or venting. The top may bulge upward. In severe cases the top of the capacitor may show signs of electrolyte venting which appears as a small amount of cream-colored paste around the top of the capacitor. One or both of these symptoms indicates that the capacitor has or will likely fail.
11. If the logic board has bulged or vented capacitors, replace the logic board as well. Refer to the next topic in this section, Special CompTIA Codes, for repair coverage information.
Apple has created the following two CompTIA Codes to use for repairs on iMac products eligible for coverage under the iMac G5 REP for Video and Power Issues:
If it's necessary to replace both the logic board and power supply, use both CompTIA Codes.
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