Bootup with Black Screen and No Light from Keyboard

I did an update on my Mac tonight and it rebooted. My MacBook Air is set up reboot from bootcamp with Windows 7 Professional. There was the blinking cursor and then the Microsoft loading up green horizontal progress bar. Then the ready to use music was played but the whole screen went out with keyboard having no light. It seems that windows was booted up all right but there is a problem with the screen driver or something. How can I fix this?
I had this problem before when Windows 7 on bootcamp did a recent update about a week ago. The screen went dark - same problem. I went into Mac side to run my latest Parallel version. It booted up Windows & fine but the wimdows was not recognized as genuine. I called Microsoft and got the key to re-actuvate Windows fine with driver updates. Then when I rebooted from bootcamp, Winodws 7 came on all right like I had before windows update.
Now I cannot resolve the second time with black screen as the windows 7 was genuine when I open windows 7 with Parallel on Mac side. I do not know how to fix it now. Please advise and help.

Hey Rollino,
Sounds like you're in the "firmware trap" There were a lot a sites about this but this appears to have most of the info/procedures:
http://www.macintouch.com/panfirmware.html
The main trick is to use an external monitor and reinstall the firmware altho' some of the other tricks might help.
BTW Welcome to Apple Discussions.
Good luck.
Richard
Message was edited by: spudnuty

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Solved it. Thank you very much for that!

Bootup with Black Screen and No Light from Keyboard

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