How Do You Diagnose & Repair Desktop LCD Backlight Problems?
The liquid crystal display (LCD) monitor that connects to your desktop computer is powered by an inverter board and a cold cathode backlight bulb that shines a light through a sheet of plastic to display images on the screen. If your LCD monitor is no longer displaying images the problem is most likely caused by the backlight bulb burning out. You can repair the monitor by manually removing its case and replacing the burned-out bulb. Step 1 Power on your computer and wait until there should be an image displaying on your LCD monitor. Look directly into the monitor from a distance of about 1 inch way. Cup your hands around your face to block out the light in the room and get a clearer view of the LCD screen. Check to see if there is a faint light visible in the screen, which will indicate that the cold cathode backlight has gone out, or no image at all, which will indicate a different problem. Step 2 Check the manual that came with your desktop LCD monitor or navigate to the manufacture
