First Build Issues, Fans and Mobo work, No display. System shuts off by itself after 5 minutes

[azalea34]

Hi All.

So I built my first PC yesterday and it wouldn't turn on so I replugged everything in and got the fan and mobo working with nothing on the display. The led lights light up red for DRAM and CPU. I have tried resetting the bios, plugging the ram into different slots, unseating the CPU, plugging the monitor into the GPU. But it still won't show anything and the system turns off (or dies?) by itself after 5 minutes or so. Please help. 

 

Specs: 
CPU: Ryzen 5 3600
Gpu: xlr8 1650s
Psu: Corsair cx 550m 
Case : cm nr400 
Mobo: as rock b550m pro 4 
Ssd: wd blue band sata m.2 2280
Ram: xpg z1 ddr4 8gbx2 3200hz

 

Edit: Got the lights to turn off for DRAM and CPU - DRAM wasn't snug, and CPU plug wasn't clicked. Now light is on VGA and BOOT on mobo. Still no display.