I've had my P520 for over a year, and what just stopped working was working fine the whole time. I make my living with this camera!! Literally. I use it for technical and publication photos, and have been mostly very happy. The few things it won't do - it wasn't designed to do.
The automatic adjustment was working beautifully, but now when in Shutter priority, no matter what I set the speed to, or whether I aim it at very bright or very dark targets, the f stop is locked at 3.
The same was happening in Aperture priority, until I hit "reset all" in the menu. At the moment, A is working; but if I change anything, it quits again. And I need to be able to use S.
Prior to this happening, I was trying to adjust the Manual mode so I could understand and use it (I've never been able to) - I did tweak a few settings, and immediately the problem appeared.
I have "reset all" - in A, S, M, and in the setup menu. Nothing works.
For most of the time, I've been using "best shot selector", which I like - but after getting A to work- I set it to BSS - and it quit working.
My firmware is 1.0.
help! :-)