If it's the backlight, why did the computer work for three days with the new inverter? Seems as though a new inverter wouldn't have made any difference at all if the backlight was the problem. Incidently, changing out an inverter is really easy. If I can do it, almost anyone should be able. Don't pay big bucks to have a computer tech do it. Backlight - not so sure!
Randini, thanks for your help!