Lenovo ThinkPad E450 User Manual page 106

8. Click Properties. If you are prompted for an administrator password or confirmation, type the
password or provide confirmation.
9. Click the Driver tab, and then click Update Driver.
10. Click Browse my computer for driver software, and then click Let me pick from a list of device
drivers on my computer.
11. Clear the Show compatible hardware check box.
12. Select the correct manufacturer and model for the external display. If you cannot find your monitor on
the list, stop the installation of this driver and use the driver shipped with your monitor.
13. After updating the driver, click Close.
• Problem: The screen is unreadable or distorted.
Solution: Make sure that:
– The monitor information is correct and the appropriate monitor type is selected. Refer to the solution
to the above problem.
– Make sure that an appropriate refresh rate is selected by doing the following:
1. Connect the external monitor to the monitor connector, and then connect the monitor to an
electrical outlet.
2. Turn on the external monitor and the computer.
3. Right-click on the desktop, and do the following:
– For Windows 7 and Windows 8.1: Click Screen resolution.
– For Windows 10: Click Display settings, show the displayed window in full screen, and then
click Advanced display settings.
Note: If your computer cannot detect the external monitor, click the Detect button.
4. Click the icon for the desired display (the Monitor-2 icon is for the external display).
5. Do the following:
– For Windows 7 and Windows 8.1: Click Advanced settings.
– For Windows 10: Click Display adapter properties.
6. Click the Monitor tab.
7. Select the correct screen refresh rate.
• Problem: Wrong characters are displayed on the screen.
Solution: Did you follow the correct procedure when installing the operating system or program? If you
did, have the external monitor serviced.
• Problem: The Extend desktop function does not work.
Solution: Enable the Extend desktop function. See "Using an external display" on page 34.
• Problem: If you use the Extend desktop function, you cannot set a higher resolution or higher refresh
rate on the secondary display.
Solution: Change the resolution and the color depth to lower settings for the primary display. Refer
to the solution to the above problem.
• Problem: Display switching does not work.
Solution: If you use the Extend desktop function, disable it, and change the display output location. If
a DVD movie or a video clip is playing, stop the playback, close the program, and then change the
display output location.
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User Guide