Lenovo 278182U - IdeaPad Y430 Dual Core T3400 2.16 GHz, User Manual, Page: 63 / 150

Chapter 4. Troubleshooting
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If these items are properly set, and the screen remains blank, have the
computer serviced.
When I turn on the computer, nothing appears on the screen, but I
hear two or more beeps.
Make sure that the memory card is installed correctly. If it is, but the
screen is still blank, and you hear five beeps, have the computer serviced.
When I turn on the computer, only a white cursor appears on a blank
screen.
Restore backed-up files to your Windows environment or the entire
contents of your hard disk to the original factory contents using OneKey
Recovery. If you still see only the cursor on the screen, have the computer
serviced.
My screen goes blank while the computer is on.
Your screen saver or power management may be enabled. Do one of the
following to exit from the screen saver or to resume from sleep or
hibernation mode:
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Touch the touch pad.
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Press any key.
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Press the power button.