Did you every get your pc running I just did my first build and I’m in the same position as you My led for boot is on too
PC specs are :
CPU-AMD Ryzen 5 3600x
Mobo-MSI B450M PRO-VDH MAX
Ram- RIP JAW 2x8GB 3200 DDR4
Graphic card- Radeon RX 590
Power supply- power specs 650w 80+ bronze...