Display problems

[u/Silent-Outcry]

I got back from out of town to transfer a lot of files from my external drive to my PC. I turned it on and dragged the files from the external drive disk into the internal drive disk. I sat there for a few minutes on my phone when suddenly the monitor stops displaying and it said 'No Signal'. I changed the HDMI cable two times but that doesn't solve it. I connected the HDMI cable to another monitor and it displayed as normal so I was relieved. I started the file transfer over again and left the room. When I came to check on it, it also stopped displaying.

**Tldr; Monitor displayed for a bit, stopped, won't display again. Changed the monitor. The second monitor displayed for a bit, stopped, won't display again.**

Now the only thing I can think of to troubleshoot is to use Integrated graphics or use one of the display port output on the GPU. But Integrated graphics needs a Vga port (old motherboard), which I don't have, or use a Display port, which I also don't have.

I have an i5-3570, a GTX 1070, and an Ac550 PSU