MBP Black Screen after software update

This is posted also in OS X.6.8 forum:
Hello to all, Just after dowloading today's latest updates, iTunes, Safari, something about file exchanges and Apple remote I beleive, there needed to restart and once done, no chime and black screen...
All was perfectly fine just before, and I did backup beforehand.
Tried to reset PRAM, restart in Single user, Safe mode, Installation Disk, all with no success.
I will let it powered off and let it cool down for a while if it can help, but it was not particularly hot when restarted.
Any other suggestions ??
Many thanks !!

Hi Clinton,
Thanks for your quick answer.
Actually, I'm using 17" version as I've last check the version was OS X 6.8.
I did pressed buttons to see if it works behind, I believed it works there's light in caps lock, makes noises when I pressed the sound button and esc button.
I did pressed the light F2 still NO DISPLAY.

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