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Hello, after the GPU issue, Apple replaced my MacBook Pro 2011 Logicboards. Afterwards I had multiple issues with my MacBook Pro were the Logicboard had to be replaced again and again. Now the Reseller said that Apple replaced the sensor starting in 2011 were it is possible that after replacing the HDD with a SSD causes the error because the firmware of the harddisk delivers information which are misinterpreted by the MacBook Pro. I didn’t find anything in the internet. Did anyone heard about this problem ?
Another known issue but not admitted by Apple is the high rate of failure of the Hard Drive/IR cable. Here’s how to replace it, also get the cable from the 2012 `5" model: MacBook Pro 15" Unibody Early 2011 Hard Drive/IR Sensor Cable Replacement Here’s the cable: MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable
