Repair manual

Troubleshooting Introduction - 1
Introduction
Troubleshooting procedures for the iMac (Summer 2001) com-
puters are almost identical to the iMac (Early 2001) and iMac
(Summer 2000) computers. Read below to see what’s new and
different.
Troubleshooting information for the iMac can also be found in
Apple’s Knowledge Base (http://kbase.info.apple.com). Refer to
article 95143, iMac: Troubleshooting Procedures, or to article
95148, iMac (Summer 2001): Service Repair Manual.
What’s New and Different:
1. Important: The following logic boards use a thermal pad
(922-4364) to help cool the microprocessor: 661-2425,
500 MHz, 661-2426, 600 MHz, and 661-2458, 700 MHz.
If this pad is not replaced when the main logic board is sepa-
rated from the divider panel assembly, the microprocessor
may overheat and become damaged.
It is crucial that a fresh thermal pad be used each time you
detach the logic board from the divider panel. (An exception
would be if you are simply testing the logic board and only
detach it for a few minutes).
2. The 500 MHz iMac (Summer 2001) for education uses logic
board 661-2447. All other 500 MHz iMac (Summer 2001)
computers use the 661-2425 logic board.