Computer Screen Problems - Lenovo ThinkPad X240 User Manual

Computer screen problems

• Problem: The screen is blank.
Solution: Do the following:
– Press F7 to bring up the image.
– 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 on the desktop, and click Personalize.
2. Click Display at the left.
3. Select Change display settings. Check whether the screen resolution is correctly set.
4. Click Advanced Settings.
5. Click the Adapter tab. Ensure that the correct device driver name is shown in the adapter information
window.
Note: The device driver name depends on the video chip that has been installed on your computer.
6. 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 not, click the Troubleshoot button and follow the instructions on the screen.
7. Click the Monitor tab. Ensure that the correct device driver name is shown in the adapter information
window.
8. 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 not, click the Troubleshoot button and follow the instructions on the screen.
9. Click the Color Management tab and then click Color Management. 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.
10. Open Device manager to check whether the device is working correctly. If not, follow the troubleshoot
instructions on the screen.
• Problem: Incorrect characters are displayed on the screen.
Solution: Did you install the operating system or 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.
Solution: This is an intrinsic characteristic of the TFT technology. Your computer display contains
multiple thin-film transistors (TFTs). A small number of missing, discolored, or bright dots on the screen
might exist all the time.
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User Guide