X-T1 playback screen not displaying

[Learningful]

I'm a new X-T1 owner, having migrated from a Canon system. I've had my new kit for less than a week. Was shooting on the weekend and review/playback screen was working perfectly. Today I took a few more test shots, and I can't get the camera to display my images. When I press the review button, I can see a very faint outline of the image (almost invisible) but that's it. Yes, I've been experimenting with screen settings and such today, but I can't figure out if I did something to cause this, or....

 

Any assistance would be appreciated. Thanks

[Learningful]

OK - I think I figured it out myself. While adjusting the shutter-speed dial, I inadvertently set it 1/4000. Reset to "A" and all is well.