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Apple Computing Products:
macOS - Desktop Hardware
PowerMac G4 Dual Optical - will not boot & no display
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<blockquote data-quote="mike23" data-source="post: 918522" data-attributes="member: 123771"><p>PowerMac G4 Dual Optical - Model Number 8570 EMC No 1914 : 1.25GHz DP/256M DDR@ 333/80G/Combo/MDM</p><p></p><p>This machine was used daily until February 2007. From then till the last week of September 2009 the machine was in storage and was not powered up</p><p></p><p>When tried for the first time in over 2 years, the machine powered up and the main switch on the front of the computer came on but no audible chime was heard. The machine will not boot & no display (apart from grey screen visible).</p><p></p><p>The 3.6 v lithium battery was replaced. PRAM & NVRAM has been reset via the keyboard commands : Command+Option+P+R keys. After this, the chimes would work on power up but nothing is visible on screen. Also although the keyboard is functional evidenced by the success of the PRAM reset commands, the num & caps lock lights will not work nor will the CD drive "arrow" eject button. I have also removed the battery, reset the PMU on the logic board, and left the machine for over 30 minutes before powering up again:</p><p></p><p>Please advise if there is anything else I can try before I take it to a dealer for repair ?</p><p></p><p>Many thanks</p><p></p><p>Mike</p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p></blockquote><p></p>
[QUOTE="mike23, post: 918522, member: 123771"] PowerMac G4 Dual Optical - Model Number 8570 EMC No 1914 : 1.25GHz DP/256M DDR@ 333/80G/Combo/MDM This machine was used daily until February 2007. From then till the last week of September 2009 the machine was in storage and was not powered up When tried for the first time in over 2 years, the machine powered up and the main switch on the front of the computer came on but no audible chime was heard. The machine will not boot & no display (apart from grey screen visible). The 3.6 v lithium battery was replaced. PRAM & NVRAM has been reset via the keyboard commands : Command+Option+P+R keys. After this, the chimes would work on power up but nothing is visible on screen. Also although the keyboard is functional evidenced by the success of the PRAM reset commands, the num & caps lock lights will not work nor will the CD drive "arrow" eject button. I have also removed the battery, reset the PMU on the logic board, and left the machine for over 30 minutes before powering up again: Please advise if there is anything else I can try before I take it to a dealer for repair ? Many thanks Mike :( [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
PowerMac G4 Dual Optical - will not boot & no display
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