Go 620 issues after update

[Kimchuck0521]

I did the update then tomtom stopped functioning properly. Keeps going dark, but not shutting down. Tried restart, reset still doing same thing. I would like to CALL for help, but I cannot find a phone number. I am unable to get to factory reset on my unit. Is the any way to do not on screen? I haven't had this unit that long. I'm so frustrated. Can anyone help?

 

[Arno]

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