[SOLVED] MotherBoard on bord Video card not working

[MeepKid]

i just build my Pc im Trying go use my motherboard on board Video Card but its Black screen when i plug ing my old GPU its works im trying to use it for work cant figure out how to change it or its DOA
its ROG STRIX B450-F Gaming 2 got it on sell using RX550 to make it run

 

[TerryLaze]

You need a CPU with integrated graphics, mobos don't have GPUs of their own.