No signal through Displayport cable

[Special Agent 星雨]

First up, the specs because they're important.

 

CPU: i7 3770

MOBO: ASUS P8H61

GPU: MSI GAMING GTX 970

PSU: Corsair HX650

STORAGE: 120GB SSD from Kingston and 750GB SSD from Crucial

OS: Windows 10 Home 64-bit

 

Don't think I've missed anything yet.

 

Monitors: Left (secondary) ASUS MX279H connected to GPU via HDMI (male) to HDMI (male) cable, front (primary) ASUS VG248QE 144HZ monitor connected to GPU via Displayport (male) to Displayport (male) cable.

 

 

**CONTEXT**

Basically, I ordered some Noctua fans to use as exhaust fans because my airflow is quite terrible. They arrived today so I unplugged all the cables going out from my PC (power supply cable, mouse, keyboard, mouse, ethernet etc.). I took my PC from underneath my computer to above another table so I could take the side panel off to install my new fans.

 

 

***PROBLEM***

After installation, I replugged all the cables back into my computer, flicked on the switch on the PSU and pressed the power button.

 

First, I see the BIOS screen on my secondary monitor (it always posts to secondary monitor instead of my main I have no idea why but it doesn't bother me), sweet, everything is normal.

Next, I see the windows logo on my secondary monitor and I'm thinking everything is working and I'll be back to gaming in no time.

 

What happens next just shocks me. Normally my desktop icons are on my main monitor.... because it's the main monitor. But instead, this time around, the icons are all on my left monitor, and after the windows logo my main monitor goes black, and a "Displayport no signal" notification pops up in the middle of my main monitor, then it goes to sleep (I presume) because the blue light on the bottom right of the monitor turns orange.

 

***THINGS I'VE TRIED***

- Unplugging the power cord from my MAIN monitor to the wall for about 5 minutes, as this has apparently helped some people, it definitely did nothing for me.

- Reinstalled ALL drivers from 368.XXX to 376.XXX. Uninstalling previous drivers using DDU in between installations.

- Unplugging the power cord to both my PC, main monitor and secondary monitor.

- Trying only using my main monitor via Displayport, secondary monitor power cord/HDMI cable unplugged.

- Trying 3 different Displayport cables (including the one that I've been using previously)

 

 

Despite all this, HDMI still works with my VG248QE (main monitor), displayport doesn't.

 

 

Please help! 

 

I consider myself quite familiar with computers and have been able to solve most of my problems alone before. But I've spent the most of today trying to figure this out and have not been able to.

 

Any help is appreciated!

 

If you require any additional info I will be more than happy to provide it to you.

[Guest]

Check nvidia surround settings? 

[Special Agent 星雨]

According to my NVCP surround settings, it only shows my secondary monitor connected, in other words, only one monitor is shown as connected.

[ZothOmmog]

Have you checked that the cable actually locks into the GTX970 DP port, I've heard and read about that some people just put it in, think it is connected 100% but then the case blocks the locking mechanism of the DP cable and that is why they never got a signal to begin with?

[Special Agent 星雨]

37 minutes ago, ZothOmmog said:

Have you checked that the cable actually locks into the GTX970 DP port, I've heard and read about that some people just put it in, think it is connected 100% but then the case blocks the locking mechanism of the DP cable and that is why they never got a signal to begin with?

I have made sure that the cables are plugged in correctly on both the monitor port and the GPU port.