Lenovo ThinkPad T440p, User Manual, Page: 152 / 183

2. Click Keyboard .
3. Select the Hardware tab. In the Device Properties pane, make sure that you see this message:
Device Status: This device is working properly.
If keys on the keyboard still do not work, have the computer serviced.
• Problem : All or some keys on the external numeric keypad do not work.
Solution : Make sure that the external numeric keypad is correctly connected to the computer.
Problems with the display and multimedia devices
This topic includes the most common problems with displays and multimedia devices, including the
computer display, the external monitor, audio devices, and the optical drive.
Computer screen problems
• Problem : The screen is blank.
Solution : Do the following:
– Press F7 to bring up the image.
– If you are using the ac power adapter, or using the battery and the battery-status icon shows that the
battery is not depleted, press F6 to make the screen brighter.
– If your computer is in sleep mode, press power button to resume from the sleep mode.
– If the problem persists, follow the solution for the following problem.
• Problem : The screen is unreadable or distorted.
Solution : Make sure that:
– The display device driver is installed correctly.
– The screen resolution and color quality are correctly set.
– The monitor type is correct.
To check these settings, do the following:
1. Right-click anywhere on the desktop, and click Screen resolution .
2. Click Advanced Settings .
3. Click the Adapter tab to ensure that the correct device driver name is shown in the Adapter
Information window. Then click the Properties button. If you are prompted for an administrator
password or confirmation, type the password or provide confirmation. Check the Device status box
and make sure that the device is working correctly. If the device is not working correctly, click the
Troubleshoot button and follow the instructions on the screen.
Note: The device driver name depends on the video chip that has been installed on your computer.
4. Click the Monitor tab to ensure that the correct monitor type is shown in the Monitor Type window.
Then click the Properties button. If you are prompted for an administrator password or confirmation,
type the password or provide confirmation. Check the Device status box and make sure that the
device is working correctly. If the device is not working correctly, click the Troubleshoot button and
follow the instructions on the screen.
Note: The device driver name depends on the video chip that has been installed on your computer.
5. Click the Colour Management tab, and then click the Colour Management button. In the displayed
Colour Management window, click the Advanced tab and ensure that the settings in the Windows
Colour System Defaults area are set as desired. If you are prompted for an administrator password
or confirmation, type the password or provide confirmation.
• Problem : Incorrect characters are displayed on the screen.
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User Guide