Chosen Solution
I’ve tested multiple hardrives with known working partitions. i’ve swapped out the hardrive cable with a new functional cable. tested the hardrive on separate macs, and they work fine. I’ve performed a Pram reset and reset the SMC to no avail. It passed multiple extended hardware tests. It has no peripherals connected and isolated further by removing the non essential components, Airport/diskbay. And i legitamitly have ran out of ideas. any thoughts are welcome…
Is it shutting off at 75% loading bar? Usually it’s bad GPU in the 2011 15” unibodys.
