Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I think that, unless your camera is 'broken' and in need of service-repairing, it might be that its functions are crippled by an inadequate battery that has aged somewhat.
Rechargeable batteries, eventually, all fail, either by not delivering enough power, or by not providing enough voltage to power the device they supply.
In this case, picture-taking and image-storing may be impossible owing to inadequate power from the battery.
If the charger is of a type that plugs into the camera, then try the camera with the charger plugged in to it. If the camera works fine that way, then your battery (or batteries) are indeed suspect and should be replaced.
(And if that is the case, then the replacement battery needs to be charged up for 6+ hours before its first use, owing to its having been on a shelf for a considerable time.)
Let me know what you think, please, since you are on the scene as it were, and know the history and age of the batteries you are using.
Is there another lens to try using? perhaps the lens assembly you have mounted on the camera is where the problem is.
I would agree the camera is probably where the fault is.
Is there anything odd about the memory card in the camera, perhaps?
Were you using the camera in the bright hot sun, in temperatures above 92 degrees F., or in high humidity conditions?
Is it possible that something, dirt or dust, might have gotten on the camera lens mount, while a lens was being changed? Or, that you might have touched the contacts on the lens mount (most likely the lens mount on the camera body) ?
I'm sorry - somehow your response got lost for a few hours.
I suggest, since ERR probably means something fairly serious is wrong, that it may be either
- sporadic, that is, not permanent, or
- permanent 'breakage' of the camera, not just a glitch.
You can try a factory settings reset, but an 'ERR' really has nothing to do with that.
Try removing the batteries, and leaving the camera on a (dry, non-humid, non-dusty) shelf or other undisturbed place for overnight. Then put the batteries back in and try the camera again.