LED #4
Indicates that the computer and the LCD display panel are communicating. This LED will be • ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be installed incorrectly or need replacement.
Contact your insurance agent. I've written many insurance reports on lightning hit machines. They usually end up getting replaced with a new machine because the hit can weaken so many things.