The only parts I changed were the motherboard, CPU cooler and case. I also added a m2 ssd. Everything worked fine before the build is as follows:
R5 1600
Aorus B450 I WIFI
Zotac GTX 970
Patriot Viper 2X8GB 3000Mhz
Seasonic S12 II Bronze 520w
Notcua NH l9a
Silverstone sg13
Wd green 480gb ssd
Ocz trion 150 240gb
Seatagte 2tb hard drive
When turned on, all the fans spin, but there is no display output. Oddly, only one of the fans on my graphics card is spinning. Furthermore, holding the on switch doesn't turn off the pc. Also, any connected mouse/ keyboard doesn't light up. Thanks