Today I started my first PC build, while every fan (including the video card) and LEDs are working but there isn't a sound when I turn on the PC and my monitor isn't receiving a signal. There is a 6-pin cable and an 8-pin cable from my power supply that are not being used and there doesn't appear to be any compatible sockets on my motherboard.
Power supply - SeaSonic M12II 520 Bronze 520W
Motherboard - BIOSTAR TZ77XE3
Power supply - SeaSonic M12II 520 Bronze 520W
Motherboard - BIOSTAR TZ77XE3