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Displayport stopped working

Bartholomew
By Bartholomew
in Troubleshooting
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Symptoms

Post fine, image on screen during post, windows bootloader screen shows (with the turning circle of spheres); mind you this is like bios on some default resolution.

Then screen blanks (normal when resolution changes) as windows loads, can see hdd activity. Normally screen comes back at hires with logon screen but that no longer happens; either the monitor goes into sleep mode, or goes to "no connection" display.

 

how did it start

Monitor, gpu, dp cable combo worked fine for a year. Last week used without problems, set system in sleep mode at night, next morning on trying to wakeup using kb, mouse as usual, no picture, monitor stayed in sleep. Then tried powerbutton on pc, to wake up (thinking the pc wouldnt wake), nothing, so proceeded to 5 sec power press to turn off. Did turn off, so turned on, and then had the above symptom.

 

things tried

Thinking this was some windows issue due to the hard powerdown, went into safe mode, that booted ok in low res. Then disabled gpu in device manager, then rebooted into normal mode which worked. Then tried installing drivers again, during install (near the end) same behavious as "symptoms"; at the "change res blank screen point" no image from that point and noticed gpu fans spinning full blast (does not do this when booting windows using drivers, then its just no picture). Shutdown through powerbutton wont work, after reboot same behavious as symptoms description again.

 

Further things done:

1. Fresh install windows

2. Tried current and previous gpu drivers

3. Tried different DP cable

4. Tried disabling freesync on monitor

5. Tried differend dp port on gpu

 

All: same symptoms. 

 

current state

Using hdmi. That works fine, just miss out on 75hz and freesync so thats a bummer.

Unfortunatly dont have a 2nd monitor to try at this time.

What mistifies me is that in bios and loader screens dp does work, just not higher res.

 

system specs

Asus ROG strix 2060 (regular, non super)

Samsung 27" 1440p S27H850QFU

I5 6400, 16GB corsair vengeance

Asus Z170k mobo

 

Any ideas or experiences highly appreceated!

 

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https://linustechtips.com/topic/1187714-displayport-stopped-working/
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try a different monitor. 

 

i would have tried:

a different cable

different port on GPU

HDMI on GPU

different DP port on monitor

different monitor

 

in that order.

We can't Benchmark like we used to, but we have our ways. One trick is to shove more GPUs in your computer. Like the time I needed to NV-Link, because I needed a higher HeavenBench score, so I did an SLI, which is what they called NV-Link back in the day. So, I decided to put two GPUs in my computer, which was the style at the time. Now, to add another GPU to your computer, costs a new PSU. Now in those days PSUs said OCZ on them, "Gimme 750W OCZs for an SLI" you'd say. Now where were we? Oh yeah, the important thing was that I had two GPUs in my rig, which was the style at the time! They didn't have RGB PSUs at the time, because of the war. The only thing you could get was those big green ones. 

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Something close to this happened to me. After two years of no problems my system seemed to have died. The display port monitor displayed the "No signal" message. Not thinking I hit the reset switch. The system seemed to reset and hang on boot.

 

Long story short, after transplanting the M.2 boot SSD to another completely different system, I found out the system was really booting and after turning on the integrated GPU in BIOS I could bring up the system on HDMI but still nothing on the display port of the add in GPU card.

 

I did have a second monitor and after playing with Windows and trying to set up the add in GPU card and the second monitor the display port suddenly started working again.

 

I wish I really knew what fixed the issue as the problem followed the Windows installation and not the hardware. This is the best I can offer. I hope it helps in some way.

Two roads diverged in a wood, and I—I took the one less traveled. So where the heck am I?

(Apologies to Robert Frost)

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3 hours ago, VioDuskar said:

try a different monitor. 

 

i would have tried:

a different cable

different port on GPU

HDMI on GPU

different DP port on monitor

different monitor

 

in that order.

As the post said, already tried different cable, different (dp) port on gpu, and am currently using hdmi as workaround.

Monitor only has 1 dp in.

 

Will try another monitor soon though; thanks for responding :)

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2 hours ago, zaster said:

Something close to this happened to me. After two years of no problems my system seemed to have died. The display port monitor displayed the "No signal" message. Not thinking I hit the reset switch. The system seemed to reset and hang on boot.

 

Long story short, after transplanting the M.2 boot SSD to another completely different system, I found out the system was really booting and after turning on the integrated GPU in BIOS I could bring up the system on HDMI but still nothing on the display port of the add in GPU card.

 

I did have a second monitor and after playing with Windows and trying to set up the add in GPU card and the second monitor the display port suddenly started working again.

 

I wish I really knew what fixed the issue as the problem followed the Windows installation and not the hardware. This is the best I can offer. I hope it helps in some way.

Thanks for sharing, gives a least some hope of things restoring magically :)

Hope to try soon with another monitor.

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