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My iMac is not powering up.
I checked the power chord.
Held in power button for ten-seconds then press again. The diagnostic lights flashing off and on non stop even when pressing the power button. But does not start
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Reseat your RAM. Try just one stick in each of the slots at a time to test both the RAM and the slots.
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If those are diagnostic lights have you checked your owners manual or online for the information they are trying to tell you. Is the flashing displayed in a repeated sequence? If yes, then that information would be potentially useful to be posted here.
- de prop man
Thanks for replying to my question
As so as the Mac is plugged in.
The first light that indicates power from the PSU stays on
The other 3 flashes together every five seconds without the power being pressed
- de Terry Dixon