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Apple Computing Products:
macOS - Desktop Hardware
iMac won't turn on
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<blockquote data-quote="techiesteve" data-source="post: 1430412" data-attributes="member: 98520"><p>The power supply in your iMac is running while mains is applied. You can meter the output for 12V to determine if it has failed. Only Friday had one, apparently dead. Dropped another one in to check all else was OK, that was dead too. This was the exception, but something else had failed and was current limiting the power supply. Mostly it's the power supply that fails.</p></blockquote><p></p>
[QUOTE="techiesteve, post: 1430412, member: 98520"] The power supply in your iMac is running while mains is applied. You can meter the output for 12V to determine if it has failed. Only Friday had one, apparently dead. Dropped another one in to check all else was OK, that was dead too. This was the exception, but something else had failed and was current limiting the power supply. Mostly it's the power supply that fails. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac won't turn on
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