Question B450M DS3H no display (new rig)

[Silverscreen07]

So building a new rig and this is what I had to start with:

GIGABYTE B450M DS3H
AMD RYZEN 3 2200G
CORSAIR VENGEANCE LPX DDR4 3200 (2X 8GB)
SAPPHIRE NITRO+ RX 570 4GB

first boot up had no displays, tried different set ups such as 1 ram stick, only on board gfx etc no luck. Realised the ram sticks weren't part of supported list so bought the HyperX version that was on the list and tried the same different set ups and I still have no display.

Should I resign to it being a bad mobo and get a replacement?
Alternatively, could it be the monitor? I got the Acer KG221Q but have also had my original Sony monitor and had no luck on either.

 

[Dark Lord of Tech]

Sounds like it might be the board.

 

[scout_03]

does any of the board boot led stay on lit also did you try it with onboard only no gpu in system list your psu .