Just to confirm what you have done thus far:

You calibrated with the turntable in the appropriate position. The calibration pattern assembly was lightly fixed to the turntable so it didn't move when you rotated the board?

When you say only one camera is working, which mode are you in? By default in auto scan mode only one camera image is shown. If you go into manual scan mode you should see images from both cameras. If you don't see images from both cameras in manual mode, then I agree something is physically wrong with your hardware.

Than again, installation should be a breeze, not the nightmare you describe. If it was in fact very difficult perhaps something went sideways during setup.

If you can provide further detail as to what you have tried and where you are in the software when you do your tests, that would help diagnosis.

Regards,

Dave @ Nerv