There are a couple of links to CCFL replacement on laptops but they will at least give some guidance and general idea of what is involved in replacing the CCFL.. still trying to get a specific procedure for you though
[http://www.fonerbooks.com/laptop_5.htm|Link 1]
[http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/|Link 2]
Quote from link 1, "The average life for a laptop backlight is on the order of 30,000 hours, or more than three years of 24 hour a day use. When the backlight in a laptop flickers or fails, it's more likely the inverter than the CCFL tube."