I stayed up too late last night looking at the manual and the internet to answer this question, and I can't find the answer, so I'm just gonna ask.
The K-7 should turn off the rear screen after a few seconds of inactivity, right? I think it did when I got it, but it doesn't now. If I view an image, then forget to press the shutter button, to turn it off, the pic stays on indefinitely. Or until, I presume, auto shut down. I've bee screwing around a lot with the settings, and I updated the firmware yesterday, so I'm not sure what I've done.