The Samsung SI-B8T072280WW is a laptop LCD inverter board. It is compatible with Samsung NP-R509, R510, R519 and R610 models. This board connects the LCD (liquid crystal display) to the laptop motherboard and is responsible for supplying the voltage needed to power the backlight of the LCD. The SI-B8T072280WW helps provide a clearer and brighter picture when viewing a laptop computer's monitor.