Chosen Solution
I have this laptop I’m trying to fix but still no results. What I’ve tried so far: Internet recovery starts loading, shows the apple logo and then white screenDiagnostics test shows no errors foundReseat RAM and reset PRAM/NVRAMBought a new hard drive cable, but still white screenCompletely wipe the hard drive (no partitions now) and MBR/GPT, both no difference, still white screen What would be your suggestions? Maybe try to put my motherboard in the oven? I heard that works sometimes. If so, what temperatures and how long? Any help is appreciated, thank you!
Ovens are for baking cookies, not logic boards! You are correct, the white screen indicates a bad hard drive or hard drive cable. We prefer to go with the 2012 hard drive cable when replacing. Pull your drive and hook it up using a USB to SATA adapter externally and see if the drive is working correctly. What OS-X are you trying to run? This model also had a recall on the GPU (program now expired) but we can look at that later. UPDATE Try starting in Target Mode to see if the GPU has failed. Target Mode is holding down the T key on start up. Let us know your results, please UPDATE with the Target mode working and your Safe Boot not, it is telling us your GPU has failed. See the bottom of this post where your machine was included in the extension program https://www.apple.com/support/macbookpro… UPDATE @danj solution worked https://apple.stackexchange.com/question…
There are not that many reliable labs with the right machines, skills and access to new GPU chips, but some like Rossman in N.Y.City undoubtfully can do the job properly and might be worth the steep costs they would be charging. After all these are the last 15" non retina upgradable Macs out there and still pretty efficient besides GPU issues. The only caveat here is to avoid people who would do “reballing” and kick boards in one kind of oven or the other in the end. @danj
