Brian and all those who are still here/there-
Maybe a little early to declare victory (resolution or whatever), but this is a Tuesday morning (the morning of the typically dead PC) and everything is working fine.
After a small amount of mouse movement, my system came back up with the locked screen, looking for my PIN. Everything was normal, working as it should be working. I intentionally left a few things running overnight (a couple of Edge browsers, OneNote, File Explorer, Quicken and my Password APP) - and everything was still there and running this morning.
So, I guess I am in good shape - and still at a loss as to what was going on. BUT I will have to give credit to the Firmware update that took place a couple of weeks ago. After the update, the Sleep mode problem was fixed (the MISSING Sleep mode timer reappeared) AND for 2 weeks now, the Tuesday morning dead machine phenomena has not resurfaced (the problem of EVERY Tuesday having to Power Off/On my PC to get it back functioning).
I still do not understand the Tuesday morning phenomena of my machine essentially being dead, so-to-speak. Tuesday doesn't seem to line up with anything. Anyway, it is time to let it go and be happy that my system is running fine, running like it should be.
I guess I will go back (if I can do that) and mark the note with the unsolicited automatic(?) Firmware update as the resolution of my problem - as I did nothing else to fix the problem - no in-place upgrade or anything else.
So, thanks for the interest, for those left reading this thread and as always, appreciate the help.
ron in shawnee