Notebook Hardware and Upgrade Questions

A large number of people have the same problem I have with the sleeping laptop that goes comatose (won't respond) and won't shut down properly.  My laptop is an Envy 17t, product number K0C15AV.

To clarify:

     - If I place it on "sleep mode", odds are it will not respond when I return, and,

     - If I just leave it on, unattended, without placing in the sleep mode, the screen saver will come on for awhile, then it eventually goes to a black screen and will not wake up or respond when I return.

     - Additionally, when shutting it down for the night, in most cases it goes quiet and the light stays on.  I must force it off by pressing and holding the power button for several seconds.

I have installed the software driver update, as prescribed on this site, and have seen little improvement. This problem started in June or July 2016 and have no doubt its shortening the product lifespan.

I have had the HP Support Team work on my computer 3 times and a local computer company, with no success. 

I don't think a system restore or BIOS was done.  The first HP Support technician (in July 2016) adjusted the sleep settings; the 2d one told me he couldn't do anything and told me to take it to an on-site repair place; the local on-site repair focused on doing virus scans; and the 3d HP support tech said it was due to apps, and removed a couple things that he figured were not needed.  Nothing has helped.  It's very frustrating when you spend big money to get a quality product and end up with a lemon.

Has HP come out with any updates to resolve?  If the problem cannot be resolved, there needs to be some type of product exchange program implemented or a refund issued.