No signal detected

[mediumi0]

Hello everyone. I just builded a new gaming pc like 3-4days ago. Two hours ago i left my pc on when i went to local shop for some food and when i came back my pc was sleeping. I tried to press any key on the keyboard or move my 🖱, but nothing happend. My monitor says no signal detected on DP. I tried connect it through hdmi, still says no cable connected. I tried to switch I/O on psu aswell, still the same.. My pc is running as usual, rgb working, cpu and gpu fans are running aswell. Oh btw my keyboard or mice doesnt seem to work, I can connect it through monitor or pc, but they are dead. What should i do next? Thank u

Monitor: BenQ Zowie xl2430 

Gpu: gigabyte rtx 2070 windforce 2x

Win 10 pro activated

[mediumi0]

And i tried to connect dp and hdmi through motherboard's ports. Still nothing. Oh and by the way, yesterday i went to sleep while my pc was still running, when i woke up i found it off, i mean my pc shutdown itself after no using it