PC not handling OK unespected power losses

Phazoner

Distinguished
I have an MSI Nightblade X2B (custom MoBo) and every time electricity is gone it can't restart unless I try to start it, then "unkindly" power off it letting standby button pressed for seconds, and disconnecting it from power source again. Sounds like MoBo problem because screen receives signal but its all black and doesn't go on.

What problem can I be having?