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

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Strange vertical lines with random pixel colours

Hey everyone,

Received a late 2009 Mac model 10,1 for a repair, the screen was disconnected but after reconnecting there are bars of pixels randomly coloured, looks like wall paper. See attached

Block Image

Block Image

Any help would be greatly appreciated!

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What does an external display look like? Is the image clean on it?

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@danj I wouldn't have any way of testing that, I don't see any hdmi or vga ports on the back.

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@millerbes - Mac's use mini DisplayPort connections which then can connect via an adapter to VGA or HDMI. You'll need to grab one.

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@danj - Alright, just ordered one, be here by tomorrow, i've installed a spare HDD into the mac, going to install some sort of headless linux OS onto it for now. Can I plugin my windows USB keyboard into the mac? and what key combo would it be to bring up the boot device screen?

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@millerbes - How about just installing the proper OS for the system, so the system is more useful. You can go upto macOS High Sierra (10.13.6)

Go here to get it: How to get old versions of macOS

Follow this guide to create a bootable USB thumb drive (32GB)How to create a bootable installer for macOS

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Not good ;-{

You have proved the issue is within the GPU logic. I'm suspecting the VRAM chips need replacing. If you have a hot wok station you could try reflowing the chips with some fresh flux/solder and hope fo the best. Follow this guide iMac Intel 21.5" EMC 2308 Logic Board Replacement to take it out. Otherwise its time for a new logic board.

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Ben Miller 将永远感激不已
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