Problems With The Display And Multimedia Devices - ThinkPad S440 User Manual

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, and audio devices.
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 gauge shows that the battery
is not depleted, press F6 to make the screen brighter.
– If your computer is in sleep mode, press any key 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: Ensure 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.
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 Color Management tab, and then click the Color Management ➙ Advanced to check
whether the color quality is correctly set, and ensure that the other information also is correct. If
you are prompted for an administrator password or confirmation, type the password or provide
confirmation.
• Problem: Incorrect characters are displayed on the screen.
Solution: Did you install the operating system or application program correctly? If they are installed and
configured correctly, have the computer serviced.
• Problem: The screen stays on even after you turn off your computer.
Solution: Press and hold the power button for four seconds or more to turn off your computer; then
turn it on again.
• Problem: Missing, discolored, or bright dots appear on the screen every time you turn on your computer.
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User Guide