I am working on a Dell Inspiron PP22X laptop. I replaced the broken LCD screen after it had been dropped. Now, the screen is dimmer than it should be. BIOS settings for brightness are maxed. Windows settings are maxed. This has got me stumped......When I press the FN key and the UP arrow to increase the brightness the screen goes dimmer and brighter with each push. Not progressivly brighter like it should. It does the same thing with the DOWN arrow. My guess would be the inverter for the CCFL. Could it be the MB? BIOS update? I dont think it could be the screen itself, picture is clear, just not as bright as it should be. Any help would be appreciated. Thanks.