Trouble with first homebuilt computer

YungXbino

Commendable
Sep 4, 2016
1
0
1,510
Case: NZXT 340
MOBO: gigabyte ga-78lmt-usb3 rtl
CPU: AMD 6 core fx-6300
PSU: EVGA 700W
RAM: 2×8GB BALLISTIX DDR3
HDD: seagate 1tb SSHD
VGA: Gigabyte r736 OC

I put everything together and I turned it on but it said that it couldn't read the hard drive and it couldn't detect the optical drive which I didn't buy one. I looked all over the Internet to find out how to get past that to the bios and I couldn't find anything helpful. So I took out the graphics card and a stick of ram and connected the fans included in the case because I forgot to connect them. I plug my computer back in and now it's just a black screen and none of the fans are working even on the CPU (which it worked the first time I turned it on) the only thing that lit up was the LED light around my power button. Any suggestions? Hopefully I didn't ruin my computer already.