Why has the camera locked up?
Camera is frozen. Screen is on (special effects/image mode) & lens extended. Camera will not turn off or respond to menu, playback or directional keys. What do I do to un-freeze /unlock it?
Didn't see any answers, so I simply opened the battery/SD compartment and removed SD chip then battery. Put them right back in and everything is working again as it was before it locked up.
The best solution is using a SD Memory Card with great data transfer rate, like Sandisk Extreme Pro 95MB/s.
After change SD Memory, the camera has not been frozen or made this issue! Hope it help.