Capture card/Monitor/Gpu issue?

Theknowlestweet

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Feb 28, 2015
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This issue is a strange one and is completely new to me, I'll try to explain this as simply as possible but there is a fair bit of information over how my system works.

I'm running a 2 pc setup to stream to twitch, it's worked fine for a year now but for some reason yesterday my capture card decided to show "no signal" and I can't for the life of me work out why.

The setup consists of a Gaming pc and a Streaming pc, The gaming Pc sends the game video to the streaming pc Via HDMI cable into a capture card in the streaming pc which is then encoded and sent to twitch.

The GPU in the Gaming pc is a 980ti, and it has 3 cables connected to it:
1x HDMI (to the capture card in the streaming pc)
1x Display Port (to the monitor i play games on)
1x DVI (to my 2nd monitor)

Yesterday I started getting "no signal" on the stream pc so I started troubleshooting by:

-Testing the HDMI cable (it works)
- Uninstalling capture card software and reinstalling / updating drivers
- Reinstalling windows 10 on streaming PC to see if something had corrupted
- Reinstalling GPU drivers on gaming PC
- Reinstalling windows 10 on gaming pc
- Removing CMOS battery from both pcs and draining power (left for over an hour with no battery)

To my annoyance I found what is causing the issue but I have no idea WHY or how to fix it.
When I remove either the Display port cable, or the DVI cable (that goes to both gaming monitors) the capture card picks up a signal, I can remove either of those cables (or both) and just leave the HDMI cable in the GPU to the capture card and it works.

Up until now I've never had this problem and the capture card worked fine when all 3 cables were plugged in to the GPU, so i assumed it was a GPU issue. HOWEVER, it also works when I remove the DVI or Display port cables from the Gaming monitors (leaving them plugged into the GPU)

Worth Noting I have 3x monitors, the 3rd monitor is the streaming PC monitor which runs from a crappy gpu I have in that PC via HDMI.

So yeah, strange one. Capture card now only works If I unplug either gaming monitor 1 or gaming monitor 2.

Any ideas what could be causing this?
I've attached a quick paint image of the setup to hopefully explain it easier.

https://imgur.com/a/YkmtVx4

Thanks,
Lee


EDIT - I don't think this is a power issue as the setup has not been upgraded or changed and it worked previously.
 

Theknowlestweet

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Feb 28, 2015
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Fixed it, For some reason Nvidia control panel was recognising the capture card but it was greyed out, I had to reinstall nvidia drivers again for it to recognise, the capture card was then displaying a monitor that did not exist (I could move the mouse to the right of my monitor and it would go to another invisible monitor) So I then set the display settings to duplicate desktop 1 onto desktop 3 (desktop 3 was showing on the capture card)
 

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