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PRAM not working. Basically, it takes me to the desktop. The only thing that is working is Command + S, is there something that I can do there?
 
The keyboard is fully working but only when it boots on the desktop, I tried also with an external keyboard via USB, not working the commands.
 
I found the problem, was the keyboard, I forgot that I replaced it with an older model 2002, a friend gives me one from 2005 and is working with ALT and C key.

Problem solved!
 
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