Question Help, PC won't start up

[Grahaamh]

Hi my PC build was plugged out of the mains by accident.
Since this happened it won't start up I've reset cmos. Reseated gpu, ram. Any idea what problem could be ?



Video of issue.

 

[Grahaamh]

Gigabyte b450m ds3H
2x Corsair ddr4 6gb
Corsair 650 watt power supply
Amd Cpu