Two things pertaining to the hardware. I have a D3 off grid right now and an S9 on grid that I will be moving in a couple of days so I will have a look at the hash cards for similarities.
After that, if I notice that the boards are the same I will order a Beaglebone black from Beaglebone, flash and MSD image, install and try it. It cant hurt. If this works then this will be a start at opening the platform.
You lost me here. What would you flash it with? The S9 firmware? Are you saying that the rest of the units are the same, and it could just be the firmware on the processor board blocking the ability to run other algorithms?