Here's an update, and a call for advice.
I sent my laptop into Lenovo. (I had purchased a comprehensive multi-year warranty).
I got it back fixed... or not. Same issue was immediately present. So I called them and they told me to send it in... again.
Today I got it back for the second time. I immediately checked and I saw that the issue vanished. So I spent much of the day reinstalling all my programs (they wiped it clean this time), and when I was almost completed, I realized that the fingerprint scanner, which was part of my power button, was not connected. I checked the device manager and I see that it is not installed. Either they replaced the keyboard with a non-fingerprint one, or they never reconnected that part of the button.
So I called them back, and after they made me reset my computer and run all sorts of diagnostic tests, they told me to send it in... AGAIN!
I said ABSOLUTELY NOT (yes, caps intentional!) and that they must replace my machine. I didn't spend money to buy a computer just that it should sit in FedEx boxes going back and forth between my house and the incompetent repairmen at Lenovo. So she said that she will refer this to customer care for replacement and they'll contact me in the next few days.
Question is as follows: Do I lose my paid warranty if they give me a new computer? Can I demand that they reinstate my warranty on the new model? Also, I want to get something real in compensation for this heartache and time waste. THEY BROKE MY COMPUTER! My fingerprint reader was WORKING when I sent it back. I think they are responsible to go way further than a typical warranty.