1. Unplug your laptop and remove the battery pack and laptop ac adapter.
2. Locate the rubber screw covers around your screen. There are typically four, but some models may have more.
3. Remove the screw covers. Take care not to lose any. They pop off and, if you are not careful, could go flying.
4. Place your fingers between the front bezel (the plastic piece around the LCD screen) and the screen. Gently work your way around the screen to remove the front bezel and expose the screen assembly.
5. Remove the inverter from the screen assembly. It is held on by tape in most models. In some models the inverter board may be right at the bottom of the screen assembly, below the actual LCD. Other models have the Gateway MX3215 LCD inverter behind the screen. To disassemble the screen, you will need to either unscrew the screen from its metal holder, or just lift the screen out to expose the inverter.
6. Disconnect the wires leading from the Gateway MX3215 Inverter. One wire goes to the backlight, while the other goes to the video card.
7. Look on the back of the LCD inverter for a model number or serial number. Having this exact number will make it easier to order a replacement.
8. Connect the video wire and the backlight wire into the new inverter and affix it using the tape that held the original in place. If you do not have that tape anymore, or it has lost its adhesiveness, you can buy more from computer parts retailers.
9. Put the screen back in place if you need to, and snap the front bezel back on.
10. Screw the front bezel screws back in, and place the screw covers back in place.