Black screen, no chime 2007 24" iMac A1225
Replaced mother board and graphic card and now I’m getting nothing on the screen or chime.
I replaced these as I was getting a black screen with a repetitive chime about every 4 or 5 seconds.
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Locate the onboard diagnostic LED’s reference this guide: iMac Intel 24" EMC 2134 and 2211 Diagnostic LED's
Tell us what you get.
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