Brightness setting missing after ML upgrade - SMC & PRAM resets don't fix

I've seen a few posts on this issue but none of the solutions have worked for me. PRAM reset definitely worked but did not bring back the brightness settings, and I've tried both SMC resets for portable macs (easily removable battery and non-easy) - but I don't know what to look for to know these worked right... doing ctrl + option + shift + power button when off resulted in a long tone noise, so I assumed I did this correctly to reset SMC?
Anyways, they didn't work, and I'm stuck with an unadjustable screen brightness that burns my eyes out at night time. It was previously adjustable before the mountain lion upgrade from snow leopard.
My specs:
MacBook Pro 2.4ghz 15" - Mid/Late 2007 (Model A1226)

Try
Reset SMC http://support.apple.com/kb/HT3964
Then reset the > NVRAM & PRAM
http://support.apple.com/kb/HT1379?viewlocale=en_US
Pete

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