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Model A1311 / Late 2009 / 3.06 or 3.33 GHz Core 2 Duo processor

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No graphics on built in display

I have this Mac that was given to me dead. I’m trying to fix and hopefully learn something in the process.

I figured out it had a bad video card so I replaced that and now it works perfect on an external monitor and it even detects the built in monitor but it will not display anything on it.

All 4 onboard diagnostic LED’s light up and the backlighting comes on but it is just a blank screen. The hard drive I put in it had Sierra on it which works great with external but maybe it doesn’t support the LCD?

I replaced the LCD just in case it had a problem with the same results. I will attach a pic of the system log because it will endlessly repeat the same thing and I don’t know what it means exactly.

I do have the Snow Leopard DVD but I can’t figure out how to get it installed.

Any help will be greatly appreciated!!!!

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Use a flashlight to shine into the display are you able to see the faint images of your desktop icons? If you are the LED driver board. If not the LVDS display cable needs to be looked at as well as the logic boards connection as you likely damaged it in the opening process.

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I cannot see anything with the flashlight and i have changed the lvds cable and inspected the connections very thoroughly without seeing anything wrong.

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There's only the LVDS cable (and its connections) to the display or the display its self. So you'll need to check again as you missed something here.

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It seems almost like it’s a software issue because i have swapped out every hardware piece that would be related (including logic board) with no change whatsoever. How can i get snow leopard on this drive? I cannot boot from the dvd even if i wipe HD clean. It just shows white page with crossed out circle.

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You can try to turn around the display cable, that worked for me when i had similar issues

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If he put the display cable in backwards on the logic board he likely blew the inductor and a cap! This would for sure stop the display from working.

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egscomputers zal eeuwig dankbaar zijn.
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