Lenovo 278182U - IdeaPad Y430 Dual Core T3400 2.16 GHz, User Manual, Page: 66 / 150

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Chapter 4. Troubleshooting
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If the sleep indicator is on, your computer is in sleep mode. Connect
the AC adapter to the computer; then press any key or the power
button.
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If the sleep indicator is off, your computer is in sleep/hibernation
mode or power-off state. Connect the AC adapter to the computer;
then press the power button to resume operation.
If the system still does not return from sleep mode, your system has
stopped responding, and you cannot turn off the computer; reset the
computer. Unsaved data may be lost. To reset the computer, press and
hold the Power button for 4 seconds or more. If the computer is still not
reset, remove the AC adapter and the battery.
„ Computer Screen Problems
The screen is blank.
Do the following:
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If you are using the AC adapter, or using the battery, and the battery
status indicator is on (is blue), press Fn + to make the screen
brighter.
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If the Power indicator is in blinking blue, press any key or the Power
button to resume from the sleep mode.
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If you still have the problem, do the Solution in the following problem
“The screen is unreadable or distorted.”