Check your TomTom satnav if you haven't used it in the last 12 days. Most of those sold 'recently' ... say the last 2-3 years will no longer work. NO GPS SIGNAL appears which effectively stuffs the unit. This appears to affect all models.
This is a hardware fault with global implications ..... see below. If you're thinking of buying one don't buy one from Halfords, Amazon, or whoever. This is a faulty chip in all current and past stock.
I've been unable to fix mine, so the remedy doesn't appear to work.
2000 posts of complaint worldwide so far.