Battery connection and start-up procedure

[WAC]

XK 5.0 2012 I recently had minor paint repair undertaken and believe the battery was disconnected. I have since lost my radio reception but still have my on-screen presets. Everything else works okay. Should I disconnect the battery and short the leads to re-boot the memory. If so, is there a re-start procedure to be followed?

[Jaguar Owners Club]

Are you sure nothing was disconnected in the boot area when they were carrying out strip and refit?

[WAC]

Nothing else needed to be removed since the paint repair was to the rear-upper panel. 

[WAC]

I checked the aerial lead from under the rear spoiler, connected to the amplifier behind the boot lid trim. After that, I gave up trying to follow the loom!