Chosen Solution

MacBook Pro 15" Retina Display Mid 2010 Does anybody know what the repair for this would be? The system appears to completely fine in all other respects: new battery, new SSD, 8G memory. Passed memory, SMART, Fans, Bluetooth, Network, Partition map, & file structures tests.

What does the built in hardware test tell you? Restart your system and hold the ‘D’ key to enable it. I would recommend you use it before believing TechTool. For reference: Startup key combinations for Mac If you have an issue here it would likely require getting your logic board repaired or replaced.