This has happened twice in the past few months. My screen will go black while my monitor and computer stays on. During this time I can also hear sound from my headset still. If I'm on a voice program I can also still hear and talk to people. The only fix for me is to hard restart my computer. The motherboard/CPU/PSU are all new, I recently replaced them 4 months ago when I ran into problems with them. I am suspecting it is either my monitor or graphics card, can't be sure what it is.
PC Specs:
Intel Core i7 4790K Quad Core @ 4GHZ
ASUS Z97 Pro Gamer ATX LGA1150
EVGA GeForce GTX 970 Superclocked ACX 2.0 4GB GDDR5
Corsair RM750x Fully Modular Power Supply 80+ Gold
Kingston HyperX Fury 16GB Kit (2x8GB) 1866MHz DDR3
Crucial BX200 480GB SATA SSD
Western Digital Caviar Blue 500GB 16MB Cache 7200RPM SATA HDD
PC Specs:
Intel Core i7 4790K Quad Core @ 4GHZ
ASUS Z97 Pro Gamer ATX LGA1150
EVGA GeForce GTX 970 Superclocked ACX 2.0 4GB GDDR5
Corsair RM750x Fully Modular Power Supply 80+ Gold
Kingston HyperX Fury 16GB Kit (2x8GB) 1866MHz DDR3
Crucial BX200 480GB SATA SSD
Western Digital Caviar Blue 500GB 16MB Cache 7200RPM SATA HDD