Definition An LCD inverter is a laptop computer component that powers the display. It provides the backlight, which makes the screen easy to read. When a laptop screen stops working or goes black, it is often due to a faulty inverter. CFL Tubes LCD screens have cold fluorescent light tubes, which provide the light behind the screen. The inverter takes DC power from the laptop, and inverts it to AC power, which is needed for the tubes to light up the screen. Technical Specifications Typically, an LCD inverter will generate 5 or 12 volts of current at voltage regulator modules of 1,200 or 2,500. They are engineered to work in temperatures ranging from minus 40 degrees to 85 degrees Celsius. Location The inverter is normally installed in the inside cover assembly. It sits behind the screen panel, very close to the LCD. It is possible to replace an inverter without taking it to a professional, but if installed incorrectly, it can cause more serious issues.