Your Garmin help, please

I did update the software recently but it still uploads data fine and always has done. It's always switched itself on when charging right from new. I'm doing a L2P ride over the bank holiday and have got the route all loaded on the device so will check for updates when I get back. Can't risk upsetting it when it's working fine otherwise...

The 800 turns on when you plug it in. Turn it off, job done.