Rig wont booting after Electric cut

Rig failed to booting after electric cut.
already unplug CMOS Battery for 10 minutes
Reflash my HiveOS
Removed All GPU
And still no changes

My Rig spec
3x RX 470 4gb
2x RX 570 4gb
Motherboard B450 Steel Legends
RAM 8gb HyperX
Proc Athlon 3000G

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