Can anyone help please? My TomTom 6250 profesional has locked into a loop.

ChrisThomas Registered Users Posts: 10
Legendary Explorer
edited December 2021 in Devices using Wi-Fi®
It flashes the logo every 4 seconds and will not respond to the power button. I've tried a quick press and also holding the button in for 10 seconds and all intervals between - but nothing! Any ideas?