Originally posted by JohnX One other thought. Check the controls on the grip to ensure they're not accidently between settings.
Originally posted by promacjoe The first thing you should check, is the battery grip power switch, Make sure it is turned off. For me, this switch being knocked on accidentally has caused more problems than anything else. So, if I have a problem with my K-3, I always check to make sure it is turned off first. that normally cures my problem.
John and promacjoe, I just finished trying to replicate the problem at home. I must have taken about 50 pictures at different shutter speeds, went up to 20 secs, using the remote with the battery grip installed and on the tripod and had no problems at all; even switched from the DA 55-300 to the 18-135 and still could not replicate the problem I had the night before.
Then I decided to move the tripod so I could take some pics of my dogs resting near the Christmas tree and suddenly I got the problem I had last night. The camera was again switching from live-view to normal view continuously, even tried to make some adjustments but was not able to get into the menus correctly since the live view screen would override the menu screen each time.
I removed the battery grip and when I turned the camera on it kept on doing the random switching, cleaned the contacts of the lens and no dice, each time I turned on the camera it would continue with the problem; replaced the lens with another one and the problem continued. Took out the battery and put it back in and the problem continued. Fired off some shots and the camera would make this loud muffled sound, actually it sounded more like an electrical problem than a mechanical one.
Finally I took out another spare battery that I had, the original battery that came with the camera, and replaced the battery that I was using, also original Pentax D-LI90E battery that I bought back in November, and the camera started to function normally again.
Took a few shots and all was working as it should be, then I switched to the battery that I was using before and the camera continued working correctly.
Unfortunately I had to go out with the family thus I could not continue with my testing but somehow I believe this is more an electrical problem because of the sound that the camera makes each time I take a picture when the ramdom live-view switching is happening.
Tomorrow I will continue to do more test, will use the original battery that came with the camera to see if I get the same error and also will turn off the slow shutter speed noise reduction, currently is on auto, to see what happens.
If all else fails, then I would do a hard reset and if that doesn't work I'll see about downgrading the firmware, from 1.21 to 1.11.