Half of my Powerbook's Screen is Darker

Hey all. Half of my Powerbook's screen is brighter than the other side. The left side is darker, and it gradually becomes brighter when you eyes move across the screen to the right. When you look at the entire screen, there is a definite difference. I've tried different lighthing angles, it has nothing to do with that. My Powerbook is also out of warranty. Anyone had this problem/know any ways to help?
I have also noticed that when I set the brightness to the lowest possible, the screen goes complete black...
Thanks for any comments.
Powerbook G4 Mac OS X (10.4.6)

janani
See my reply in the thread called "Darker corner..."
15" 1.25GHz/12" 1GHz PBs, PPC Mac minis, 12" iBooks G3/G4, Mac OS X (10.4.5) Cube, TAMs, iPods 2G/4G, iPs, AEBS, AX

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http://img535.imageshack.us/img535/940/screenwoh.jpg
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Half of my Powerbook's Screen is Darker

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