This instructable will be performed on a laptop LCD from an old Zenith Data Systems computer. I tried to make this instructable pretty basic and not extremely detailed because every LCD screen is different. Your LCD will be different from mine (how its held together, the number of CCFL's, etc) but the concepts will remain the same. Feel free to send me any questions you might have, and I'll try to help you out.
Replacement CCFL (Cold Cathode Fluorescent Tube)
Small Phillips Screwdrivers
Electrical Tape / Soldering Iron
Step 1: Disassembling the LCD Housing
EXTERNAL LCD MONITOR: Usually to get inside of an external monitor, you will have to simply take out all the screws on the back of the display and pull it apart. Pretty simple.
LAPTOP LCD (Shown): This can be a little more frustrating at times, but not impossible. First open up the laptop and locate all of the screws (sometimes these can be hiding under rubber feet). After removing the screws, many times you will also need to use a flat head screwdriver to pry the housing open little by little. Be gentle,, but don't be afraid to use a little force.
After getting the back of housing off the computer, disconnect the LCD from the inverter.
Now completely detach the LCD from the housing by removing the remaining screws.
Step 2: Taking Apart the LCD Itself
In this step make sure that every element of the LCD you remove is kept in perfect order so you can easily reassemble it after replacing the lamp(s). The LCD I am disassembling really didn't require me to remove too much to get to the CCFL's, but many times you will need to remove several layers of transparent sheets that are used to spread the light uniformly throughout the screen.
Just like before, locate and remove the screws holding the LCD assembly together. Take the assembly apart including any transparent sheets in the way of the cold cathode tubes.
REMEMBER! Stay organized for your own sake!
Step 3: Remove the Backlight
Step 4: Insert Your New Backlight
After inserting the new CCFL and routing the cables correctly, reassemble the LCD the same way you took it apart.
Step 5: Test Out the Display
NOTE: Be VERY careful with the exposed connections and cables, ESPECIALLY the Inverter. Touching the wrong part could not only hurt you, but damage your display. Yet again, I speak from experience.