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See Using the Power Saving Modes (page 26) for more information. . Make sure your computer is securely plugged into a power source and turned on and the power indicator light is lit. . If your computer is running on battery power, make sure the battery pack is installed properly and is charged. See Using the Battery Pack (page 18) for more information. . If the display output is directed to the external display, press the Fn+F7 keys. See Combinations and Functions with the Fn Key (page 31) for more information. . The LCD backlight of your computer may have been turned off. To turn on the LCD backlight, see Using Special-function Buttons (page 34). Troubleshooting > Display n147 N What should I do if I do not see proper images or videos? . Be sure to select True Color (32 bit) for the display colors before using video/image software or starting DVD playback. Selecting any other option may prevent such software from displaying images successfully. To change the display colors, follow these steps: 1 Right-click on the desktop and select Screen resolution. 2 Click Advanced settings. 3 Click the Monitor tab. 4 Select True Color (32 bit) under Colors. . Do not change the display resolution or colors while using video/image software or playing DVDs, as it may cause unsuccessful playback/display or unstable system operations. Additionally, it is recommended you disable your screen saver before starting DVD playback. If the screen saver is enabled, it may be activated during DVD playback and prevent the playback from running successfully. Some screen savers have been found to even change the display resolution and colors. What should I do if no image is displayed on my TV screen or external display connected to the HDMI output port? Make sure you are using an HDCP-compliant display. The copyright protected content is not displayed on a non-HDCP compliant display. See Connecting a TV with an HDMI Input Port (page 73) or Connecting a Computer Display or a Projector (page 71) for more information. Troubleshooting > Display n148 N Why doesn't my screen display a video? . If the display output is directed to the external display and the external display is disconnected, you cannot display a video on your computer screen. Stop video playback, change the display output to the computer screen, and then restart video playback. See Selecting Display Modes (page 75) for changing the display output. Alternatively, you can press the Fn+F7 keys to change the display output. See Combinations and Functions with the Fn Key (page 31) for more information. . The video memory of your computer may be insufficient for displaying high resolution videos. In such a case, lower the resolution of the LCD screen. To change the screen resolution, follow these steps: 1 Right-click on the desktop and select Screen resolution. 2 Click the drop-down list next to Resolution. 3 Move the slider up to increase or down to decrease the screen resolution. . You can check the total amount of the graphics and video memory available. Right-click on the desktop, select Screen resolution, and click Advanced Settings and the Adapter tab. The displayed value may be different from the actual amount of memory on your computer. What should I do if my screen is dark? . Press the Fn+F6 keys to brighten your computer screen. . Blocking the ambient light sensor turns your screen dark. Make sure that the sensor is unblocked. Why does the LCD brightness fluctuate when I change it or place my computer back into Normal mode from Sleep mode? This may occur on models with the LED backlight when the LCD colors are calibrated and does not indicate a malfunction. Troubleshooting > Display n149 N What should I do if the external display remains blank? Press the Fn+F7 keys to change the display output. See Combinations and Functions with the Fn Key (page 31) for more information. How do I run Windows Aero? To run Windows Aero, follow these steps: 1 Right-click on the desktop and select Personalize. 2 Select your desired theme from Aero Themes. For information about the Windows Aero features, such as Windows Flip 3D, see Windows Help and Support. Troubleshooting > Printing n150 N Printing What should I do if I cannot print a document? . Make sure your printer is on, and the printer cable is securely connected to the ports on the printer and your computer. . Make sure your printer is compatible with the Windows operating system installed on your computer. . You may need to install the printer driver software before you use your printer. See the manual that came with your printer for more information. . If your printer is not functioning after your computer resumes from a power saving mode (Sleep or Hibernate), then restart the computer. . If the bidirectional communication functions are provided with your printer, disabling the functions on your computer may enable printing. Follow these steps: 1 Click Start and Devices and Printers. 2 Right-click the printer icon and select Proper...
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