Lenovo ThinkPad T450s User Manual page 121

1. Connect the external monitor to your computer, and then connect the monitor to an electrical outlet.
2. Turn on the external monitor.
3. Right-click on the desktop, and click Screen resolution.
Note: If your computer cannot detect the external monitor, click the Detect button.
4. Select the external monitor and set Resolution.
5. Click Advanced Settings.
6. Click the Monitor tab. Check the monitor information to make sure that the monitor type is correct.
If the monitor type is correct, click OK to close the window; otherwise proceed with the following steps.
1. If more than two monitor types are displayed, select Generic PnP Monitor or Generic Non-PnP
Monitor.
2. Click Properties. If you are prompted for an administrator password or confirmation, type the
password or provide confirmation.
3. Click the Driver tab.
4. Click Update Driver.
5. Click Browse my computer for driver software, and then click Let me pick from a list of device
drivers on my computer.
6. Clear the Show compatible hardware check box.
7. Select the correct manufacturer and model for the external monitor. If you cannot find your monitor
on the list, stop the installation of this driver and use the driver shipped with your monitor.
8. After updating the driver, click Close.
9. For the Windows 7 operating system, to change the color settings, right-click on the desktop, and
click Screen resolution. Click Advanced Settings, select the Monitor tab, then set Colors.
10. Click OK.
• 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.
• Problem: My screen keeps blanking when I do not want it to.
Solution: If your computer is preinstalled with the Windows 7 operating system, you can disable any
system timers, such as the LCD turn-off timer or the blank timer by doing the following:
1. Start Power Manager.
2. Click the Power plan tab, and then select Maximum Performance from the predefined power plans.
• Problem: When I turn on the computer, nothing is displayed on the screen and the computer does not
beep while starting up.
Note: If you are not sure whether you heard any beeps, turn off the computer by pressing and holding the
power button for four seconds or more. Then turn on the computer and listen again.
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Chapter 8 Troubleshooting computer problems
105