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The PowerMac G5 is a desktop computer first produced in 2003 by the Apple Corporation. This guide will review the repair process of an Apple PowerMac G5 model number A1047 EMC 2061 from 2004. It was discontinued in 2006 as part of the Intel switch first to developers then consumers.

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Will not boot display white flashing power light (3x every 5 seconds).

Followed all/any (blog) suggestions.

Removed replaced ram.

Removed replaced video card.

Reset PRAM

Checked connections

Still just the flashing lamp and fans.

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Answered! View the answer I have this problem too

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If you have checked the ram perhaps this sheet from Apple will help. One thing it mentions I would do is reset the SMU. Ralph

http://www.apple.com/support/powermac/

http://support.apple.com/kb/TS1367

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+ agreed on RAM problem

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About the Power Mac G5 (Late 2005) diagnostic LEDs

That should help. According to the article, 3 flashes, pause means incompatible memory (RAM) is installed

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