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I tried installing Ubuntu on a new Lenovo G480. I downloaded the .iso file and burned CD to install. The computer had no OS pre-installed, I used the CD installer to install Ubuntu 12.04. After installation, when I turn on the computer, Ubuntu does not start up. I have no idea what could be wrong.

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Does it show Operating System not found or just gives a blank screen? Please describe what you see. – VedVals Mar 28 '13 at 6:49

refer the ubuntu installtion guide

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