Repair Procedure

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.

  1. Refer to the topic "Eligible Products" mentioned earlier in this section.
  2. If the computer is eligible, remove the rear cover.
  3. Affected power supplies are rated for 100-127VAC and are known as non-PFC power supplies. These power supplies were placed into iMac G5 systems destined for the US, Canada, and Japan.
  4. Proceed to the next step.
  5. Remove the power supply. Turn over the power supply to view the label. Affected power supplies have:
  • an Apple part number of 614-0293 or 614-0296 (shown below)
  • an AC Input of 100-127V, 50-60Hz (listed below the part number)

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.

Power Supply For Powermac
7.

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.

Power Mac Power Supply Repair

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.

Warning: Use caution when handling failed electronic components, and make sure to wash your hands afterwards.

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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.

Condensator Logic Board

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:

  • Use CompTIA Code 560: iMac G5 MLB/Power Supply REP when replacing a logic board, whether or not the iMac is covered by warranty or an extended service agreement
  • Use CompTIA Code 660: iMac G5 MLB/Power Supply REP when replacing a power supply, whether or not the iMac is covered by warranty or an extended service agreement

If it's necessary to replace both the logic board and power supply, use both CompTIA Codes.

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Responses

  • gabriel
    Why imac g5 power supply fails?
    8 years ago
  • Lucas
    Can selffix Mac capacitor?
    8 years ago

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