My TOM TOM One won't charge either through in-car charger or via a PC. The green light doesn't come on but works fine when connected to the in-car charger. Is this 'green light' not lit a known problem as I have a colleague with the same problem.
It may be the battery, my old navman was converted to Tom tom but kept killing the battery, fortunately they are cheap to buy, I think the secret is not to let them get absolutely flat.