The camera is out of warranty, simply owing to age, for sure.
It's good to know that you have taken good care of the camera, despite its rated tolerances.
The camera does indeed need a repair-servicing, given that it has not got a detachable lens assembly. (Not customer-detachable, anyway, as a higher-end digital SLR camera's would be.)
To send out for repair:
Digital Still Cameras
then enter your postcode or town (or both) and click one of the buttons, either
Select. (I have a memory that one of these functions does not work, though it should, in this form. So don't be surprised if it's difficult at first, or requires both town and postcode, or some difficulty like that...) ...and it will give you contact information for a service center near your location in the UK.
or - if it accepts UK customers - send to:http://www.precisioncamera.com/panasonic-camera-repair.html
If this answers your question adequately, please rate my Answer - favorably I hope - so that I may be paid. Thanks, ***** ***** luck.