Model A1224 / Early 2009 / 2.66 GHz Core 2 Duo processor

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iMac intel doru 2 core

how do you hook one mac to another to see if your mac screen is bad

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Use a Firewire cable and connect them. Start the one up that you are having issues with holding down the "T" key. Start the other machine up normally. The hard drive icon should appear on your desktop and you can then run Disk Utilities on it.

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How does this verify the screen on the one having issues?

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This answer was originally to another question.

Can't be done. Connect to an external monitor from the funky Mac. If you see nothing you have Video Card or Logic board problems. If you see your normal desktop the problem is somewhere in the internal display chain. You can check the Diagnostic LEDs on the funky Mac to see if the video processor is communicating with the display... but you'll have to strip the components out of the machines to test them.

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BTW Kenneth you've asked the same Question twice... please delete the other one.

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Kenneth Sharp will be eternally grateful.
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