Hello, graphics card(ASUS DCU2 GTX 780) isn't showing a signal to my Dell u2414h monitor.

What happened was i got a BSOD while i was playing Counter Strike GO, i shut the computer down and went into the bios. I had a 4.4Ghz overclock that i had tested before and that was stable. I thought that was the reason for the BSOD, so i turned the overclock down to 4.2Ghz, and now my computer boots, but it shows no signal.

When it boots, it shuts down one to two times and then turns on and stays on, however there is no signal, and i'm getting the "A2" error code on the motherboard.

I tried switching out the ram, that didn't work.
I tried taking out the GPU, and putting the Displayport cable into the IGPU, that didn't work.
And i tried clearing Cmos and shutting down the PC via the reset button, and that didnt work either.

I hope you guys can help me.