There was a gentleman with a similar issue a few weeks ago. Please connect a standard monitor to the video card > Using either DVI, DVI-d, or display port. Do you get video output from the card?
Grabbed this from your other thread... In case someone else has ideas:
Motherboard: Gigabyte FM2 A85X(Hudson D4) Wi-Fi Mini ITX
Processor: AMD Quad Core A10-Series APU for Desktops A10-6800K with Radeon HD 8670D
Memory: G.SKILL TridentX Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 (PC3 19200) Desktop Memory Model
PSU: Thermaltake TOUGHPOWER GRAND 80 Plus Gold 850W Full Modular
GPU: Gigabyte GeForce GTX 970 Mini ITX Overclocked 4GB GDDR5 PCiE Video Card