The screen rotation is disabled while your VAIO computer is connected to an external display. If you connect the computer to an external display while using the computer in portrait orientation, the computer screen automatically changes to landscape (horizontal) orientation.
With the LCD screen raised and the keyboard available, the screen rotation is not available.
What should I do if no image is displayed on my TV screen or external display connected to the HDMI output port?
Reconnect the HDMI cable (not supplied). See Connecting a TV with an HDMI Input Port for more information.
Make sure you are using an
Change the screen resolution of the connected TV or external display. Images may appear on the screen. See Changing the Resolution (Size) of the Screen Image for more information.
What should I do if sound interruptions occur during video or audio playback?
Sound interruptions may occur when the CPU load is high. In this case, reduce the CPU load by exiting all running apps other than a playback app, or by disabling unnecessary audio effects applied to playback.
What should I do if I do not hear sound from a digital audio device connected to the digital output port, such as the HDMI output port?
To output sound from a digital audio device connected to the digital output port on your VAIO computer, you need to change the sound output to the digital audio device. See Changing the Sound Output Device for more information.
What should I do if my microphone does not work?
Check if your microphone is selected as a recording device.
Open Control Panel and select Hardware and Sound. (To open Control Panel, see Opening Control Panel.)
Select Sound and check if there is a check mark on your desired microphone icon on the Recording tab.
If not, select the icon and Set Default.
If the icon is not displayed, make sure the microphone is properly connected to your VAIO computer.
An external microphone with a 
.
The microphone of your headset may not work with your VAIO computer. Use a Sony smartphone compatible headset.
What should I do if I do not hear sound from speakers or headphones?
Check if the volume from speakers or headphones is not minimized.
Keep pressing the Fn+F4 keys to turn up the volume loud enough to hear sound. See Combinations
