Lenovo 43R8770 - Enhanced USB Port Replicator User Manual page 24

Auto-adjust the external monitor occasionally to realign its settings with the video output of the USB
Port Replicator. This action fixes most of the issues related to the quality of the video on the external
monitor. Refer to your notebook computer user's guide for instructions on the auto-adjust procedure.
4. The external monitor connected through the USB Port Replicator is flickering.
Flickering is usually associated with CRT monitors using a low refresh rate. Always try and use the
maximum refresh rate available:
v In the Extended mode, increase the refresh rate of the external monitor.
v In the Mirror mode, increase the refresh rate of your notebook computer screen, which in turn
increases the refresh rate of the external monitor.
For more information about the supported refresh rates, see "Adjusting Video Settings" on page 10.
5. You cannot use ThinkVantage
when you attach external monitors on both USB Port Replicator VGA port and ThinkPad VGA
port.
ThinkVantage Presentation Director cannot be used for ThinkPad display settings when the USB Port
Replicator connected. To set up the display property for multiple external monitor, do the following:
v To change the display settings of the external monitor attached on USB Port Replicator, click the
USB Port Replicator icon in system tray and set up in the popup setting menu.
v To change the display settings of the external monitor attached on ThinkPad VGA port, do one of
the following:
– For Windows Vista, right-click the blank area on the desktop, click Property to open the Display
properties window and set up there.
– For Windows XP, right-click the blank area on the desktop, click Personalize to open the Display
properties window and set up there.
Audio
You cannot hear anything through your notebook computer speakers or you cannot use Microphone-in
port or audio-out port on the notebook computer.
Lenovo notebook computers default to the USB audio when the USB Port Replicator is connected,
disabling your notebook computer built-in speakers and audio ports.
To enable your notebook computer built-in speakers and audio ports:
1. Open the Control Panel, select Sounds > Audio Devices .
2. Do one of the following:
v For Windows Vista,
– Select the Playback tab, and then select a device that is not USB Audio.
– Select the Recording tab, and then select a device that is not USB Audio.
v For Windows XP, select the Audio tab, and then, under Sound Playback and Sound Recording,
select a device that is not USB Audio.
Note: To enable this change, close the application currently using the audio device and restart it.
14
Lenovo Enhanced USB Port Replicator User's Guide
®
Presentation Director to change your ThinkPad
®
display settings