Inverters are the parts that convert the power supply's low voltages to the high voltage required for your laptop's scren backlights. If this fails, your screen won't light up (although you may be able to see a faint and dark shadow image).
Because they cause the screen to stop working, inverter faults are often mistaken for a problem with the screen itself. If you're unsure which it is, please feel free to contact our experienced staff to discuss the problem first.