Build Advice PC won't turn on properly - NEED HELP

[PCguy12345]

I tried building a pc for the first time. When I press the power on button on the case the fans spin for a second, my phone can charge through the usb for a second and so forth. I know the motherboard is receiving power because the RAM will light up. The three pin PSU cable that came with the PSU is different to the one i'm using now because the one was for a European plug. Will that change anything? I have already moved RAM around.

Please help

Part list

Gigabyte PB500 500W 80 Plus Bronze Power Supply

Kingston SSDNow A400 240GB 2.5" SATA III SSD SA400S37/240G

AMD Ryzen 5 2600

RX 570 4GB

Gigabyte B450M GAMING AM4 Micro-ATX Motherboard

ADATA XPG Spectrix D41 8GB (1x 8GB) DDR4 3000MHz RGB Memory - TUF Gaming Edition

 

[PCguy12345]

OK its gpu

Sent from my CPH1729 using Tapatalk

Okay, ill try a cheap GPU and test if it's the problem.