Wow, this is all extremely good and I have not got a gadget for testing the actual computers power supply inline. I did use a good quality meter to check the incoming line and it is stable out of the surge protectors at 121 VAC.The thing tha concerns me is that only one (Toshiba) drive has the boot sequence that stalls. I am pretty sure there is something that is wrong there, just don't know what. I does seem to be linked to the video card setup. Please keep in mind all my correspondence is coming from one of the Debian 9 systems on this box. and I can also use the Win10 or the other. I have in GRUB the ability to boot from any of the 4 installed hard drives as well as a DVD drive.Thanks for such a complete answer.