Since you have a display in the BIOS it sounds like a crashed OS.
Not that you have to tell but the last few months has had a few cracked pirate Windows 7 OSes show up at the counter which were "not booting." Installing a fresh OS (not pirate) cleared them all up. About half the clients don't want to pay for the OS and they take the machine back.
My new build:
Intel i7 6700
NZXT phantom 240
Kingston DDR4 8GB (1 modul)
EVGA GTX 1060 SC 6GB
KINGSTON SSD (SATA)
DVD ROM (SATA)
Power supply Cooler Master B500
After putting all components together PC started without any problems. PC was connected through HDMI to external monitor (grafic card port). In BIOS I’ve enabled PS2 emulation to be able to use mice and keyboard. Then I set boot from DVD. Windows has been installed and was working successfully. I wanted to install driver for grafic card, which wasn’t working (but was connected). As I didn’t have CD with driver, wireless adapter , LAN cable , I turn the PC off.
After I bought USB wireless adapter, I connected it through USB. After turning on the PC my monitor stayed black with title “no connection (no source)”. HDMI cabel as well as monitor I’ve tested by connecting them to my laptop and everthing worked. The I tried to connect monitor (through HDMI) to mother board port and grafics port, nothing worked, just black screen. I do not have DVI cabel, VGA ports are not available. Then I disconnected USB wirelless card. I took away grafic card and reseted CMOS. HDMI cabel was reconnected to mother board and turned PC on. Monitor shows data now, but doesn’t run WIN7 from SSD drive, and doesn’t boot from DVD. It shows only black screen with with cursor. I am able to go into BIOS.
Could you please advise what to do in this situation ?