hi i have a 2013 xf was sitting at traffic lights today and my touchscreen went black and will not come back on so have no radio nav phone or anything rest of dash is lit up and i cant find a fuse for it in the hand book has anyone got any ideas what this could be  thanks wayne

Mine did similar a couple of weeks ago and also gave out a loud humming from speakers. After switching off engine and locking/unlocking car a few times I bit the bullet and disconnected the battery for two minutes, reconnected the battery and started the car....all back in order no problems since. Make sure you have your radio code handy if required, mine doesn’t need a radio code so I was fine.

good luck.