Recently, my late 2008 2.4GHz Macbook (Aluminum) has started having issues with the screen. When I boot up the computer, everything works as it should. If I put it to sleep for more than about an hour, however, when I return to it the backlight refuses to brighten. I can still faintly see things, like when I turn the brightness all the way off, but toggling the brightness buttons has no effect.
Restarting the computer returns it to normal behavior... until it goes to sleep again.
Restarting the computer returns it to normal behavior... until it goes to sleep again.