Similar posts here have suggested pulling out the mains plug and waiting for at least five minutes before restarting. If this doesn't work call it in as a fault.
_________________________________________________________ Graham I am a VM customer. There are no guarantees that my advice will work. To say thanks click the kudos thumb. If I have solved your problem please click the helpful answer button.
I dashed home from work yesterday for the set appointment, between 4 pm and 7 pm. When it got to 7.45 pm I rang to check to see if someone was still coming only to be informed that the appointment hadn't been booked in right. I am now booked in for Saturday, will let you know if the problem get solved.