Lenovo 3000 C Series Service And Troubleshooting Manual page 24

Solving computer problems
Problem: The screen is unreadable or distorted.
Solution: Make sure that:
v The display device driver is installed correctly.
v The screen resolution and color quality are correctly set.
v The monitor type is correct.
To check these settings, do as follows:
Right-click the desktop to open the Display Properties window.
1. Click the Settings tab.
2. Check whether the screen resolution and color quality are correctly set.
3. Click Advanced.
4. Click the Adapter tab.
5. Make sure that the 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. Check the "Device status" box and make sure the device
is working properly. If not, click the Troubleshoot button.
7. Click the Monitor tab.
8. Make sure the information is correct.
9. Click the Properties button. Check the "Device status" box and make sure the device
is working properly. If not, click the Troubleshoot button.
Problem: Incorrect characters appear 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: Missing, discolored, or bright dots appear on the screen every time you turn on your
computer.
This is an intrinsic characteristic of the TFT technology. Your computer's display contains
Solution:
multiple thin-film transistors (TFTs). A small number of missing, discolored, or bright
dots on the screen might exist all the time.
Problem: A message, "Unable to create overlay window," appears when you try to start DVD
playback.
or
You get poor or no playback while running video playback, DVD playback, or game
applications.
Solution: Do either of the following:
v If you are using 32-bit color mode, change the color depth to 16-bit mode.
v If you are using a desktop size of 1280×1024 or larger, reduce the desktop size and the
color depth.
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Lenovo 3000 C Series and N Series Service and Troubleshooting Guide