Asrock b450 steel legend no display

Im using asrock b450 Steel legend using 6x 1660super Was mining good no errors. Today there was a power cut and when it came back. Its not booting to hiveos no display signal, cpu fan rgb all running but it doesn't show in hiveos, no ethernet port lights. Tried resetting cmos battery no use disconnected all gpus and tried booting no use Directly plugged gpu in 16x no use Removed all gpu and tried to get display with integrated graphics no use. Anything should i tried?

Thankyou