I have a reasonably interesting situation here. I’ve come across a destroyed 2017 iMac 27", with a completely obliterated screen, enclosure and power supply. The screen is shattered into thousands of pieces, the housing is bent and several welds are broken, and the power supply has ignited and burned up where the LCD was pushed back into it. The Hard Drive was totalled as well, but that was removed along with the Flash module during recycling.
It’s anyone’s guess what could have happened to it, but I suspect it fell from somewhere, or off something.
The Logic Board however should be a runner, and a decent one at that. It’s configured with a 3.8GHz i5 Quad “Kaby Lake” CPU, paired with an AMD Radeon Pro 580 8GB Graphics Processor.
I considered parting out the board and removing the socketed Kaby Lake CPU, as that’s worth about $300 itself, but I can’t help but wonder if the board itself could be reverse engineered so I can take advantage of that AMD GPU.
I tossed around the idea of running the board in another enclosure, but hit some roadblocks there. While the board only requires 12V and GND to power it, there are two temperature sensors (PSU and LCD) that cause the board to throttle back if they’re not detected by the SMC. So some reverse engineering of the board to re-add these missing sensors is required. (Because schematics aren’t exactly readily available for these boards.) There’s also the issue of fabricating a sheet metal enclosure to hold the board, PSU, drives, connectors and wireless antennas.
That said, for such an expensive part, there isn’t a massive market for selling Logic Boards either. The machines are still under warranty, and so demand for replacement boards is low, something that won’t change for at least another three years. As it stands, the bare CPU alone is probably worth more than the entire board - it’s just a shame, considering it also houses such a powerful graphics chip.
Anyone have any ideas? Or should I just part out or scrap the board as well?