Dahua NVR not booting, black screen.

[pennepasta]

Hello everyone.
My dahua nvr stopped booting and doesn’t show video in monitor.
Tried replugging HDD and nothing happens. So i was thinking on hard resetting, but don’t know how to do it.

Picture of nvr’s inside

 

[pennepasta]

Video of nvr when powering up. Fan is disconnected.
View attachment trim.4EA806F9-A7EB-4B31-8505-136EB0C87378.MOV