Computer boots on but there's no signal to the monitor

PC Specs:

Motherboard: ASRock H77 Pro4-M
CPU: Intel i7-2600
RAM: Corsair Vengeance 4x8GB DDR3
GPU: Asus Rog Strix GTX 1070 8 GB
PSU: Corsair RM850

Hello, all.

The other when I woke up, I turned on my PC (I usually put it in sleep mode) and there was no signal to the monitor. I reconnected the cable a couple of time but no luck. Decided to use my onboard graphics and there was a signal.

In device manager, I saw an error - 45 or something like that. It said "device is not connected to the PC". Turn it off, reconnected the GPU but still nothing.

Though my GPU was dead and decided to check with my old one and it was the same - no signal at all.

After that, out of nowhere there was no signal from the onboard graphics either.

A friend of mine told me that day there were storms.

So, is it possible because of the storms mine PCI-E slots were friend but everything else is just fine? Any suggestions what to do?


Thanks in advance.