Two year old tom tom xl can take up to 15mins to get a signal any advice
The TomTom device needs to tune in on three or more GPS satelites to find your position. On start, it scans the hemisphere for any satelites and ten minutes and more are not uncommon to establish fixes on them.
The solution is a data package you can download from TomTom servers via the Home software, "QuickGPSFix". It holds precomputed satelite positions for the next few days which speeds up locking to satelites to a few seconds from minutes. However, you need to update the package roughly once a week or the initial delay will pop up again.