Went from three monitors to one, not sure why.

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Hey guys,

Usually I'd have found a solution by now, but I honestly have no idea what is going on with my system. I've owned it for a little over a year with no problem and I had a three monitor setup and everything was fine until yesterday. Yesterday, my third monitor randomly stopped working and displayed "No Signal" and no matter what I tried nothing would fix it so I stopped trying to fix it. Hours later, the signal came back by itself so I thought great! But then today it stopped working again, and now my primary monitor also stopped working. I am now down to one monitor and am worried it may be the GPU. The GPU is a GTX 670. It's shown no other symptoms of going bad. The primary monitor that no longer displays is an X-Star. When I try to plug it into my computer and boot my computer up, it goes through a color cycle and won't stop.

Basically what I'm trying to figure out is what type of problem this is: GPU, Mobo, PSU, etc? I've spent hours trying to get all 3 monitors back and the best I can do is get one back. Anyone have any ideas? I've never encountered a computer problem I couldn't fix so this is driving me insane:pt1cable:.

Some notes: When the computer is already on, it won't detect any monitor I plug into it. I have to turn the computer off, plug in my SECOND monitor only, turn it on and then it works. I ran the windows memory diagnostic and it came back clean.

Thanks in advance for ANY help and I'll be refreshing this page like crazy.
 
Solution
I found the problem. It was a driver issue. What I had to do was boot it in safe mode, uninstall my GPU, and restart. I'm running on an old driver version at the moment but I don't feel like risking the update. It's working and that's all that matters for now. Thanks for all your help Eduello!
Test the non-working monitors with any other device while using the same connection you were using originally. Also try to test the cables.

I'm fairly certain that this is a GPU issue since both of the monitors stopped working at almost the same time.
 

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Okay, I'll test the 'non-working' monitor on another system and I'll get back to you with the results asap. I'm also suspecting it's the GPU but it hasn't shown any other symptoms in terms of performance and visual quality. Everything was top notch (and still is on my single monitor). This whole problem is just weird.
 


I agree, it does sound odd that 2 connectors would fail at the same time...

You could also try updating the drivers.
 

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Okay Eduello, I connected the non-working monitor to another PC and it worked instantly. My GPU drivers were updated a few days ago. I'm clueless at this point. Did I maybe change a setting that won't let it detect the monitor when I was trying to fix the first one? My 2 important monitors were working fine and then when trying to fix the third monitor I went into the screen resolution control panel and hit "Detect" and it immedietaly stopped working and I couldn't get it to detect it since. The monitor is a different resolution if that makes any difference (1440p).
 

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I found the problem. It was a driver issue. What I had to do was boot it in safe mode, uninstall my GPU, and restart. I'm running on an old driver version at the moment but I don't feel like risking the update. It's working and that's all that matters for now. Thanks for all your help Eduello!
 
Solution