I have a late (2002) factory refurb T20 (aka Audiolab 8000T I think) which sounds quite superb. However one of the three backlight display bulbs has blown which I understand was a common problem with the model. I understand they are soldered in but wondered if anyone could help with details of the bulb type/spec and what sort of repairer I should contact (recommendations appreciated) in order to get it fixed? Oh, how long will they last once replaced (roughly) and should I replace all three at the same time? Thanks, hopefully for any help.