Dim screen

we have a gateway labtop and we turned it on today and the screen was dim. i read over some of the answers to the questions that were already posted and tried that. i tried holding fn and using the brighten key and it only got darker. the mouse seems to be bright, but the rest of the screen and everything else is like a drak grey. how can i fix this or can i fix it?!

It may be that a component in the laptop is failing, possibly the backlight or the inverter.