Update:
I was thinking of borrowing or buying memory to test the laptop and thinking of aquiring the exact same laptop on eBay but I then an idea popped into my head. I decided to really rev down the BIOS to the beginning so I installed A07 (vs. A22 which is on now.) Amazing! Whereas many things on the Internet say to upgrade the BIOS to solve problems, this was opposite. The machine started booting legacy options (like Internal HD, CD/DVD drive) and NO MORE DREADED "No Physical Memory..." message. I can now boot eCS just as it was before the problems started. Win 10 is a different story. I still could not boot Win 10 (STOP: 0xc0000001), so I put a clone copy of Win 7 in it's place which crashed upon boot, but I used my Win 7 recovery disc and it actually was able to fix it and then it booted fine. The drivers mostly updated and now it works, but of course it isn't authentic since it came from the D630. But, no worries. I don't really want Win 7. I want Win 10, so put Win 10 ISO CD/DVD in and ran setup inside Win 7. Got to the license screen and put in what I thought was my previous key which I had a picture of on my phone, but unfortunately, it would not take. Maybe because it's an OEM version? Not sure because thought this is exactly how I did it 2 years ago but can't recall for sure. Anyway, there is documentation online that says that EasyRE will fix the 0xc00000001 problem. I doubt it, but may try it. Other than that, I will have to do a clean install of Win 10 and lose everything. Bummer. Well, at least eCS works. Oh, and BTW, I put BIOS version A22 back and sure enough "No physical Memory" message returned, so A22 definitely broken for some weird reason. Went back to A07 for now. Once I get Win 10 back (hopefully), then I will experiment and see how far beyond A07 I can go without getting the "No physical memory..." message again.
Jordan