I have the same problem as described here. When booting, the backlight turns off after the Windows XP start-up screen goes away. However, if I boot into safe mode the backlight stays on.
Is there a setting that controls this or is it truly a hardware problem as you recommended to the other poster? Also, what's my best option if I don't have a service plan or covered under warranty? Will this cost me and arm and a leg, or just an arm?
I have a Latitude C610.