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Model A1286. Released February 2011 / 2.0, 2.2, or 2.3 GHz Quad-core Intel Core i7 Processor

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MacBook Pro - New SSD - Freezes during clean install of Sierra

My MacBook Pro 15 (Late 2011) recently kicked it.

I got stuck in a reboot loop. This happened while using a Thunderbolt cable to HDMI (not sure if this is relevant). I couldn't get out of this loop.

Deciding I wanted to update the drive to SSD, I went ahead and did so:

Kingston SSDNow A400 480GB SSD

I've since installed it and attempted a clean installing using a USB Sierra boot, which I created with Disk Creator. This is where I'm stuck, it loads, I can select the Sierra Boot, I get 3/4 of the way through the boot then it stops on a grey screen.

Any suggestions to what I should try?

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I also checked my old Hard drive (which I removed) and it appears to still be functioning and readable. Which made me suspect it wan't the drive causing the original problem.

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There are a couple of know issues with this machine. The first is the hard drive/IR cable. Replace it with the cable from the 2012 model. Do this first!

MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable

MacBook Pro 15" Unibody Early 2011 Hard Drive/IR Sensor Cable Replacement

The second problem was the GPU. There was a repair program on it that has now expired:

https://www.apple.com/support/macbookpro...

MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable Image

Product

MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable

$19.99

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Thank you for the info. I've now replaced the MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable, which has had no improvement, so it's looking like the GPU. I'll take the machine into an Apple store.

Thanks for the guidance

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Davin will be eternally grateful.
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