FSX transparent bands on one monitor but fine on another

I seem to be getting these transparent bands whenever I have FSXSE on one monitor but they disappear on my secondary monitor.

I can't seem to find the answer

 

To add:

This problem does not occur in the problematic monitor in full screen mode - solely windowed mode

To add:

This problem does not occur in the problematic monitor in full screen mode - solely windowed mode

 

Restore your `problem` monitor to default settings and your FSX settings to default.

That's a unique problem there and once you eliminate `operator error` you can establish whether the monitor is on its way out...

That 'problem monitor' is probably not in its native resolution, or perhaps its native resolution is low. Or perhaps it's set for too few colors.

That 'problem monitor' is probably not in its native resolution, or perhaps its native resolution is low. Or perhaps it's set for too few colors.

 

Looks like the interlacing is being interrupted. If not an inadvertent setting perhaps it's a simple setting. But firstly I'd explore the things I suggest.

Also show the FSX.cfg settings.