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Replaced Power Mac G4 logic board, now processor upgrades not recognized

23949 Views 5 Replies Latest reply: Oct 28, 2010 12:46 PM by Thomas Bryant RSS
Robert Gillam Calculating status...
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Oct 28, 2010 12:44 PM
Hi, my G4 kept freezing so, after eliminating everything else, I replaced the logic board, with the original OEM Dual 450's the machine boots and behaves normally.
However, when refitting the Powerlogix 1.2Ghz processors the machine will start, i.e fans runs and logicboard LED is on, but the front panel button light stays off and the machine will neither boot nor chime.
I remembered to set the CMU (10 secs) and PRAM, but to no avail, have I forgotten something?
Thanks
Robert
Powermac G4 Giga-ethernet Dual 1.2ghz 100bus 2 Gig Ram 2xHD 80gb+120gb USB1+2/FW, Mac OS X (10.4.9), wireless network

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