DVI/HDMI No Signal on Monitor Issue

[Alybad]

In December, I built my first desktop. Since then, I've been plagued with a problem where my monitor doesn't recognize my DVI or HDMI cable input through my GPU when I turn my computer on. Recently I found that if I unplugged my mouse when turning on my computer, it would detect the DVI input and turn on properly, but this morning it stopped working. However, I managed to turn it on by switching around what port in my GPU my DVI cable was plugged into. I then tried restarting my computer to see if it would work and it didn't work again, I had to muck around with the cable. I really want to get this issue sorted.

My PC Specs
CPU: Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz 4 Cores
GPU: Gigabyte GeForce GTX 970 4GB WINDFORCE
Monitor: ASUS VG278H
RAM: G-Skill Ripjaws 1600MHz

 

[nismoguy82]

If your motherboard has dvi as well, you can run the onboard display to rule out a bad cable. If it's good. Try a full powerful cycle on your monitor. Not just with the power button.

 

[Alybad]

to run through the onboard display would I need to take out my GPU?
also, by full powerful cycle, do you mean turning my monitor off and on again? because I've done that.

 

[nismoguy82]

Yes, you need to remove the gpu. Did you power cycle as in unplug the monitor from power outlet for at least 30 seconds?

 

[Alybad]

No I didn't. I'll try both of those now.

 

[Alybad]

It seems that doing the full cycle worked.
If it starts doing the weird thing again I'll post here, but all seems good for now
Thank you so much!

 

[nismoguy82]

No problem. It happened to me too a couple years ago. Same fix.

 

[Alybad]

Ok, so it's happened again. Unplugging the mouse again has worked, but it seems really stupid that I have to do this. Should I just take it into the shop?

 

[nismoguy82]

Do you have another dvi cable or mouse that you can switch with? One of them is probably bad and causing hardware conflicts. Also, you can unselect the solution here so your thread can remain open.

 

[Alybad]

No, I don't. I only have the one cable+mouse on me. I'm planning on getting a new mouse soon though so I can check then.
How do I unselect a solution?