Lenovo 628323U manual External monitor problems, Audio problems

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External monitor problems

•Problem: The external monitor is blank.

Solution: To solve the problem, do the following:

1.Connect the external monitor to another computer to make sure that it works.

2.Reconnect the external monitor to your computer.

3.Refer to the manual shipped with the external monitor to check the resolutions and refresh rates that are supported.

–If the external monitor supports the same resolution as the computer display or a higher resolution, view output on the external monitor or on both the external monitor and the computer display.

–If the external monitor supports a lower resolution than the computer display, view output on the external monitor only. (If you view output on both the computer display and the external monitor, the external monitor screen will be blank or distorted.)

•Problem: Wrong characters are displayed on the screen.

Solution: Did you follow the correct procedure when installing the operating system or program? If you did, have the external monitor serviced.

•Problem: The screen position on the external monitor is incorrect when that monitor is set for a high resolution.

Solution: Sometimes, when you use a high resolution such as 1600x1200, the image is shifted to left or right on the screen. To correct this, first make sure that your external monitor supports the display mode (the resolution and the refresh rate) that you have set. If it does not, set a display mode that the monitor supports. If it does support the display mode you have set, go to the setup menu for the monitor itself and adjust the settings there. Usually the external monitor has buttons for access to the setup menu. For details, see the documentation that comes with the monitor.

Audio problems

•Problem: A volume or balance slider cannot be moved.

Solution: The slider might be grayed out. This means that its position is fixed by the hardware and cannot be changed.

•Problem: The volume sliders do not stay in place when some audio programs are used.

Solution: It is normal for the sliders to change position when certain sound programs are used. The programs are aware of the settings in the Volume Mixer window and are allowed to change the settings themselves. Usually the program has sliders available to control the sound from within the program.

•Problem: The balance slider cannot completely mute one channel.

Solution: The control is designed to compensate for minor differences in balance and does not completely mute either channel.

•Problem: There is no volume control for MIDI sound in the Volume Mixer window.

Solution: Use the hardware volume control. This is because the built-in synthesizer software does not support the control.

•Problem: The sound cannot be turned off completely even if you set the Master volume control at minimum.

Solution: You still can hear some sound even though you have set the Master volume control at minimum. To turn off the sound completely, go to the Master volume control and select Mute speakers.

Chapter 5. Troubleshooting computer problems 47

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Contents User Guide Safety, Warranty, and Setup Guide Regulatory Notice Contents Appendix B. Weee and recycling Statements Protect yourself from the heat that your computer generates Read this firstPrevent your computer from getting wet Protect the cables from being damagedConditions that require immediate action Important safety informationHandle your computer gently Carry your computer carefullyService and upgrades Safety guidelinesExtension cords and related devices Power cords and power adaptersPlugs and outlets Power supply statementExternal devices Rechargeable battery notice General battery noticeHeat and product ventilation Electrical current safety informationLiquid crystal display LCD notice Using headphones or earphonesAdditional safety information Xii User Guide Product overview Locating computer controls, connectors, and indicatorsFront view CameraPower button System status indicatorRight-side view MicrophonePower status indicator USB 2.0 connectorAc power connector Media card reader slotUSB 3.0 connectors VGA connectorEthernet connector Left-side viewSystem status indicators Status indicatorsBottom view User Guide Power status indicator Wireless status indicatorLocating important product information Machine type and model labelFCC ID and IC Certification number label Specifications FeaturesBattery pack Power source ac power adapterBattery life Operating environmentFrequently asked questions Using your computerHow can I use the battery power more effectively? Registering your computerHow do I give presentations or attach an external monitor? Special keysHow do I attach or replace a device? Using the TrackPoint pointing device Using the UltraNav pointing deviceChanging the cap Using the touch padCustomizing the touch pad Checking the battery status Power managementUsing the ac power adapter Connecting the ac power adapterMaximizing the battery life Charging the batteryPower-saving modes Handling the batteryUsing your computer Establishing wireless LAN connections Connecting to a wireless LANGo to Settings Internet connection Wi-Fi network Wireless LAN connection statusTips for using the wireless LAN feature Connecting a projector or an external monitorConnecting an external monitor Attaching an external monitorUsing the camera Using audio featuresUsing a flash media card Removing a flash media card Inserting a flash media cardUser Guide You and your computer Accessibility and comfortErgonomic information Comfort Accessibility informationTraveling with your computer Travel accessoriesTravel tips Assistive technologiesUser Guide Replacing devices Replacing the batteryStatic electricity prevention User Guide Before you start, print these instructions User Guide Replacing devices Replacing a memory module Replacing devices Replacing the keyboard Replacing devices Installing the keyboard Replacing devices User Guide Replacing devices User Guide Be careful about where and how you work Troubleshooting computer problemsTaking care of your computer Be gentle with your computerCleaning the cover of your computer Computer stops responding Cleaning your computer displayNetworking problems Memory module problemsEthernet problems Spills on the keyboardProblems with the keyboard and other pointing devices Wireless LAN problemAn UltraNav pointing device problem SolutionProblems with the display and multimedia devices Keyboard problemsComputer screen problems Audio problems External monitor problemsBattery problems Battery and power problemsPower problems Sleep problems Power button problemUser Guide Getting support Getting help and serviceBefore you contact Lenovo Calling Lenovo Lenovo Support Web siteTelephone numbers Finding ThinkPad options Purchasing additional servicesUser Guide Location of the UltraConnect wireless antennas Wireless related informationWireless interoperability Appendix A. Regulatory informationExport classification notice Locating wireless regulatory noticesElectronic emission notices Federal Communications Commission Declaration of ConformityAppendix A. Regulatory information User Guide Important Weee information Appendix B. Weee and recycling statementsUser Guide Appendix C. Energy Star model information Power plan Energy Saver settings when plugged into ac powerUser Guide Appendix D. Notices Trademarks Page Part Number Printed 1P P/N
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