Three of same camera

[MarkOBS]

I hope someone can troubleshoot my problem.
I recently bought two more of the same cameras.
So now I have three that are the same.
In the list of devices all three cameras appear with the same name.
I don't think I can change this.

Only one camera is working (my first one that I installed).
How can I get the other two to work?
When I add a new source it doesn't show any camera image when I choose
the correct device. It doesn't matter if I deactivate then activate. Still the same.

 

[MarkOBS]

Well I'm making some progress but I'm still not quite there.
When I load the software that comes with the camera I can
get all three cameras to show in it (one at a time).

When I close this software and open OBS I can now get two of the cameras to show.
The third still doesn't show in the scene.
But... when I open an old scene I created before buying these new cameras
the third camera shows in the scene!!!

Tips?

 

[MarkOBS]

While I still haven't fixed the problem with the third camera on my main system I have
proved that the three cameras will work properly with OBS.

Fortunately I have an identical computer that I just tested out with OBS and the three cams.
They worked perfectly on this second computer.

I'm pretty sure now the issue is with the cables.
On the second computer I just used the short cable that came with each camera and plugged
into three USB ports.

On my main computer I have been using USB extension cables of various lengths.
It could be that and/or the particular USB ports I am plugging into on my computer.

 

[MarkOBS]

Well I pretty much resolved the problem.
I went back to my main computer and got the first two cams working with their USB short cables.
I need to run a long extension cable for the 3rd camera.
I learned that these three cams don't like long extension cables.

Fortunately my Logitech camera isn't as fussy and works just fine with the long cable.
Its quality is almost as good as the other three cams so that's how I'll keep things.