Chapter 4. Troubleshooting
The computer enters sleep | • Make sure that: |
mode immediately after | - The battery is charged. |
| - The operating temperature is within the acceptable range. See |
“Chapter 2. Use and care Information” of Lenovo Safety and General | |
| Information Guide. |
Note: If the battery is charged and the temperature is within range, have the computer serviced.
The computer does not return from sleep mode and the computer does not work.
•If your computer is in sleep mode, connect the AC adapter to the computer, then press any key or the power button.
•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.
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 |
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| battery status indicator is on, press F12 to make the screen brighter. |
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| - If the power indicator is in blinking, press the power button to |
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| resume from the sleep mode. |
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| - If the problem persists, follow the solution in the following |
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| problem “The screen is unreadable or distorted.” |
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| - Press F9 to confirm whether the backlight for the LCD screen has |
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| been turned off. |
The screen is unreadable or | • | Make sure that: |
distorted. |
| - The display device driver is installed correctly. |
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| - The screen resolution and color quality are correctly set. |
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| - The monitor type is correct. |
Incorrect characters appear | • Did you install the operating system or programs correctly? | |
on the screen. |
| If they are installed and configured correctly, have the |
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| computer serviced. |
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Sound problems |
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No sound can be heard from | • | Make sure that: |
the speaker even when the |
| - The Mute function is off. |
volume is turned up. |
| - The headphone jack is not used. |
| - Speakers are selected as the playback device. | |
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Battery problems |
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Your computer shuts down | • Discharge and recharge the battery. | |
before the battery status |
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indicator shows empty. |
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Your computer operates after the battery status indicator shows empty.
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