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Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

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Fuzzy display on startup - iMac 20" early 2009

During installation of a new superdrive, I unplugged the 4 inverter cables from the display, once all put back together and on startup I get a fuzzy screen (like bad terrestrial tv signal). Once the mac has started up i can put it to sleep then wake again and the screen is back to normal. Could this be the inverter? why is it ok after sleep?


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sorted it know - just reset PRAM

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wow! i tried so many things, booted up to an external monitor and no graphic card issue, replaced the display cable, replaced the display and nothing worked.

read this and reset the pram and voila!

thanks robert.


Amazing solution, thank you Robert , i owe you a drink!


I have been booting up then putting computer asleep for about 5 years as work around. I decided to search for solution and this did solve my issue. I myself did not have a mac keyboard, for PC keyboard to reset PRAM is Windows key + ALT + P + R when powering up, wait until you hear the second chime at bootup.


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robert kebell будет вечно благодарен.
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