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Apple Computing Products:
macOS - Desktop Hardware
iMac won't start, stuck on gray screen troubleshooting and options
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<blockquote data-quote="Randy B. Singer" data-source="post: 1271641" data-attributes="member: 190607"><p>Sounds as if you have a problem that is, for now, intermittent. A cold solder joint around the power supply will sometimes be like that. It may get worse when your Mac comes up to full operating temperature, or, paradoxically, it may only tend to be a problem when your Mac is cold. </p><p></p><p>Cold solder joint problems usually crop up during the summer due to overheating and lots of temperature cycling.</p></blockquote><p></p>
[QUOTE="Randy B. Singer, post: 1271641, member: 190607"] Sounds as if you have a problem that is, for now, intermittent. A cold solder joint around the power supply will sometimes be like that. It may get worse when your Mac comes up to full operating temperature, or, paradoxically, it may only tend to be a problem when your Mac is cold. Cold solder joint problems usually crop up during the summer due to overheating and lots of temperature cycling. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac won't start, stuck on gray screen troubleshooting and options
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