Chosen Solution
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
Reseat your RAM. Try just one stick in each of the slots at a time to test both the RAM and the slots. iMac Intel 24" EMC 2134 and 2211 RAM Replacement
