Originally posted by Spodeworld I have a K20d that occasionally locks up. Not often, but just once in a while.
"locks up" covers a wide range of possible issues. It could be the electronics get confused like any computer. It could be mechanical. On the k-5 there was an issue where the mirror motor assembly would jam during a shot. On the k-3 there have been several random lock up issues. My k-x would occasionally freeze for no reason.
The basic fault varied but one common denominator was/is battery issues. The fault (whatever it is on a particular camera) would only manifest when combined with a power issue. As Steve noted it might be a good time to get a new battery. Other than that, not much else you can do. If it is electronic and random just live with it. If it is mechanical it will eventually fail completely and then you can get it repaired.