replace graphics card in macbook pro 2012

How can I determine what has happened to the dGPU, and whether there are any other problems? I cannot see the screen (obviously), but I can SSH in and see the output of system_profiler. Generally, I'm looking for advice or next steps.

In an attempt to switch (at least temporarily) to the integrated GPU, I tried: sudo pmset -a gpuswitch 0īased on 2015 MBP - how to force integrated graphics?, but that did not work. It looks like there are some similar issues ( How to disable discrete graphics card and use only integrated graphics MacBook Pro Early 2011?, MacBook Pro: How to disable discrete GPU permanently from EFI?), but none of those mention the display itself not working. Metal: Supported, feature set macOS GPUFamily1 v4 It looks like the discrete GPU (GT 650M) is the problem, because it is no longer even showing up the output of system_profiler: Graphics/Displays: It takes a while to turn on, so it wasn't clearly on for their diagnostics.)

(They could only do resets at the Apple store, as they wouldn't open it due to its age. I have tried a full set of resets, including bringing it into an Apple store. Perhaps the integrated graphics are still working and need to be switched on somehow. I'm fully prepared for the machine to be toast, but if I could continue to use it in some capacity that would be nice. It still turns on (startup sound, keyboard backlight) and I was able to enable remote access for diagnostics and double-checking that all files are recovered. The display on my 2012 Macbook Pro Retina ( 10,1 with 2.6 GHz i7) suddenly stopped working.

Replace graphics card in macbook pro 2012