A couple weeks back my nex c3 started acting funny. When in auto focus it would get stuck and I'd have to take a couple pics with it stuck until it'd become unstuck. Then that wasn't working so I'd have to turn it off and then it would be back to normal once I'd turn it back on. Now, it's not getting unstuck no matter what I do and now there is no menu option or other options on the screen. Does anyone have an idea to what is going on? Would a good cleaning by a pro help fix the problem?