There are two vendors for the iMac Summer 2000 power/analog/video board, 661-2370 and 661-2347. The boards must be exchanged like-for like. The power/analog/video board 661-2347 can be identified by a switch at SW901.

This article covers repair procedures for authorized service providers on selected Apple products, but we have published them in the Knowledge Base for the general public for educational purposes. At this time, there are a limited number of repairs that a customer can perform and these are covered under the customer installable parts program http://www.info.apple.com/installparts . If you have not been authorized to perform these procedures, please contact Apple (800-APL-CARE in the USA) or your local authorized service provider to schedule a repair.

DANGER! This procedure exposes you to high voltages that can result in death or serious injury. DO NOT ATTEMPT THIS PROCEDURE IF YOU HAVE NOT BEEN CERTIFIED AS AN APPLE-AUTHORIZED TECHNICIAN.

Products affected

• iMac (Summer 2000)

The 661-2347 board (Figure 1) has a switch at location SW901 that must be set for the type of CRT tube in the computer. The switch settings are silk-screened on the board near SW901. If this power/analog/video board or the CRT are replaced, make sure to set the switch to the appropriate position (either to LG or CPT).

The 661-2370 board (Figure 2) does not have a switch and can not be used with the CPT CRT tube. Refer to article 95060: " iMac (Summer 2000): CRT Identification " for more information.

Figure 1 Part number 661-2347

Figure 2 Part Number 661-2370