I don't have another cabinet to try, but I do have another PSU that I could swap into this cabinet. That's why I was wondering if the power supply being the culprit was even a possibility.

Yes, both MP10as get stuck at the same point. I don't recall what the final line of text was, but it was the same on both cards.

I do have some other SD cards that I could try. I had been using the SD card that I also purchased from PCLiquidations and I even tried formatting it and then loading different software versions back onto it. However, I do have some miscellaneous SD cards out of OS7100s that I could try. Not to mention that I have a few blank OfficeServ-compatible SD cards that I could load the software onto.

I will try the other PSU and some other SD cards and see what happens. I'll report back on the results. Regardless, I appreciate the assistance!