Surface Pro 4 - Screen won't wake from sleep

Thanks, MikeKirnak.  That's great to know.  

There's one hole though.  Do you know for sure that the send downloaded Windows image that did not fail on the 16xx platform was the same image that did fail on the earlier two 15xx platforms?  As you know, Microsoft updates the download image every few weeks.  

If not, do you if someone else here has?  I'd like to find a clear demonstration that the exact same image performed differently on two platforms.  That's what's needed to erase doubt about the veracity of Microsoft's implicit claim that there is no change in the hardware. 

Also, having read more of this thread than I have, what's your belief on when the unacknowledged hardware change occurred?

I am having the Sleep of Death problem, although it is infrequent.  How can I determine the lot number of my machine w/o having the original box?  I want to go into my local MS store and see if an exchange is possible.

*feeling like an idiot for getting rid of the box when I decided I wouldn't return it*

I have no other issues with this unit, so I'm hoping that it can be resolved with yet another driver update. Sure, battery life could always be better, so it depends what counts as "horrible".

Thanks, MikeKirnak.  Can you direct me to the specific posts you referred to?  I am interested in exactly what you did.  I have little confidence in the anecdotal reports that fill this thread.  But I agree that if the same image performs differently on two platforms, then there is a difference in the platforms.

They're all back a couple of pages. To sum up: I made a backup image of my lot 15xx SP4 about a month ago. Then, I restored it to factory with a downloaded MS image. I had issues immediately. I exchanged the unit for a refurb at a MS store. Issues immediately with the factory image. Tried my backup image. Issues immediately. Tried the MS image. Issues immediately.  Exchanged for a brand new lot 1613 SP4. I tried to load my backup image, but interestingly the new machine could not be loaded with that image despite multiple attempts. It loaded fine on the older two SP4s... Anyways, the factory image was now screwed up by the attempts to load the backup image, so I loaded the downloaded MS image. The lot 1613 SP4 has performed almost flawlessly ever since. The only issue at all is that occasionally the cursor will freeze for a moment while the PC is doing something.

Overall performance on the lot 1613 machine is better as well; web pages and programs load significantly faster than on my first three SP4s. Battery life is hugely improved. I got four hours or so run time watching video before. This machine gets up to seven hours run time watching the same video. I have loaded almost all of the software I had running before with no problems arising as of yet. 

Whether QC is better, or they fixed a problem in the hardware, or I just got lucky, I don't know. It does seem though that people with lot 1611 and later machines are not having these issues near as often as the older machines, at least I haven't read of an issue with the later machines in this thread. I had three older SP4s. Out of those three, three were bad. (The refurb worst of all.) I went from hating the SP4 and wishing desperately I had returned it when I could, to being a very satisfied and happy lot 1613 SP4 owner.