Surface Pro 4 - Screen won't wake from sleep

Has anyone noticed during their inability to wake from sleep whether the back of the SP4 is rather warm?  Mine seems to wake from sleep (plugged, docked w/keyboard attached) but is always warm so that I don't think it is truly sleeping. No such problem with hibernate.

Hello Gilesfrost, the details to my attempted roll back can be found in my posts under the Microsoft blog “hard to start Surface Pro 4 after yesterdays ( feb 17th) update”, on pg 3 of 3. 

The roll back uses a restore point, which should have been created just before your update. Please note that within those instructions I do not recommend doing the restore as I cannot be confident how your computer will respond.  Rather, my instructions are merely the steps I used to get my computer back to pre-2/17/2016 update reliability.

It should further be notes that the instructions include circumventing specific future firmware updates.  There is a Microsoft logic that you must consider.  If you are successful in restoring your SP4 pre 2/17/2016 update, Windows 10 will want to install it again.  I provide instructions to fix this but I leave it to the initiated to lookup the specific steps. They are easily found on the web.  Note - Be mindful that any prep you make before the restore will be lost (this does not apply to your saved files like a Word doc).

Alternatively, you can skip the restore step and the hiding of future 2/17/2016 firmware updates and try the steps that I used to roll back specific drivers. As detailed in that blog, I was unable to hide one of  several firmware updates and unfortunately it may have been the one update we are all complaining about.

I read an article about the update fixing the SP4 and SB battery drain during sleep and that power management fixes are a challenge due to the silicone. I interpret this as every computer is different and that individual sleep state battery drain experiences will vary.   Code for “we don’t really know how your computer will react but on average if you had excess battery drain, this update will tap the benefits of the update”. I assume this is why some experience improvements while others like me found new problems. I mention this because I am concerned Microsoft will not be easily able to issue a one fix update to all computers.

still sleep.

From people's research it seems to be a graphics problem both with HD 520 and Iris 540. But I can't see how that relates to Hello Windows and the cover. Without the cover I sleep fine.