Brightness adjust

Does any body knows how to solwe problem with brightness adjust on old PB (G4/400) in Tiger?
I can control brightness in 10.3.*, but in Tiger pressing F1/F2 buttons have no reactions. Also I have not brightness slider in the display control panel.
Sorry my poor english.
TiPB G4/400 Mac OS X (10.4.8)

You can change your with one off these applications:
http://www.charcoaldesign.co.uk/shades
http://www.splasm.com/products/productbrightness.html
Those did work perfect on my Powerbook G4 400 mhz.
Hopefully this is helpfull or solved your problem. Consider rewarding some points!
Please see the "helpfull" and "solved" button's on top off this message! Apple: Why reward points?

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heimer16 wrote:
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