Here are some simple instructions on how to replace a burnt out LCD backlight with a new working one to bring your LCD back to life. Inevitably, every LCD eventually goes dark, but the process to bring it back to working order is not very hard. As long as you are careful, it can be done successfully and without too much drama. Generally this is a very cheap repair, usually only around $10-20.
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
To get the the LCD screen and the backlight inside, you must first disassemble the LCD housing; this is different depending on whether it is an external monitor, or built into a laptop. But first before disassembling the housing, DISCONNECT THE POWER!
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.