Hi All, I have a TomTom One v2 and have tried using the v8.410 navcore and I'm having a few issues

It initially works but when I switch the TomTom off, it won't switch back on until I remove the SD card and refit it.

Sometimes the POI alerts don't have sounds.

Also, the TomTom shuts down after a 10 second count down if I don't operate it. Is this ok?

Any ideas?

Cheers

Bob