Lenovo B450 User Manual page 52

Chapter 5. Troubleshooting
Computer screen problems
The screen is blank.
The screen is unreadable or
distorted.
Incorrect characters appear
on the screen.
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Do the following:
•
- If you are using the AC adapter, or using the
battery, and the battery status indicator is on, press
Fn +↑ to make the screen brighter.
- If the power indicator is blinking, press the power
button to resume from the sleep mode.
- If the problem persists, follow the solution in the
following problem "The screen is unreadable or
distorted."
• Make sure that:
- The display device driver is installed correctly.
- The screen resolution and color quality are
correctly set.
- The monitor type is correct.
Did you install the operating system or application
•
program correctly? If they are installed and
configured correctly, have the computer serviced.