GamersNexus has reported it, but it still was not fixed on 16.8.1. This is the link. http://www.gamersnexus.net/news-pc/2536-do-not-use-amd-16-7-3-driver-corruption-and-crashes
It says that one of problems on 16.7.3, "Fail to colored (white, green, cream, etc.) screen on desktop. Complete system lock that requires hard reboot to recover."
I also encountered the bug. It seems that it only happened when gpu load was low. Once happened, I must shutdown by pressing power button, and then press again to start, but diplpay has no signal input, although the led indicated that the system is working. I must shutdown system again by pressing power button, and then press again to start, this time I will enter windows login screen successfully.
I found a temporary solution----make a media player playing video muted on background.
So have AMD engineers confirmed this issue? If you need further detailed information, let me know.
Windows 10 Home Edition 14393.10
Sapphire RX 470 Nitro 4GB
ASROCK Z170 GAMING ITX/AC
ViewSonic VX2475Smhl-4K connect via Displayport cable, as well as HDMI cable
Crimson 16.7.3 and 16.8.1