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My computer boots to a black screen, what options do I have to fix it?

I had installed 12.04 using Live CD on my Acer Aspire 4736z which has already Windows 7.

When it came to the boot screen, which is the Grub menu, it shows both OS. But, when I choose Ubuntu, which was the first choice, my screen just go to blank.

My WiFi signal light is on. When I choose Windows 7, I can log in and used it but not for Ubuntu. I'm stuck on the blank screen.

What could be the problem? I need someone to guide me on this.

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marked as duplicate by Jorge Castro, belacqua, Tom Brossman, devav2, con-f-use Oct 24 '12 at 9:11

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

can you try switching around virtual terminals - try ctrl alt F1, ctrl alt f2 and so on till you get something on screen? – Journeyman Geek Jun 24 '12 at 10:26
done it. but still blank screen – utamaku Jun 25 '12 at 17:14

After the screen goes blanks and the WiFi light is on, you are probably booted into Ubuntu, but the GUI is not working properly. At this point, try pressing Ctrl+Alt+F3, log in, and type sudo restart lightdm.

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