RE: Precision 7710 screen will not wake
The first Precision 7710 (purchased in June 2016) had the motherboard replaced (by Dell in September 2016) and this seemed to resolve the screen issues we had described in this post.
We are now on the second Precision 7710 (purchased in August 2016 but only unboxed last month). Issue is with screen going black but power still on but cannot get screen to "wake". After much searching found this thread. I just turned off Optimus (Switchable Graphics) in the BIOS to see if this resolves the issue. I will post the results in a few days.