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 Volume Mixer at minimum.

Solution: You still can hear some sound even though you have set the Volume Mixer control at minimum. To turn off the sound completely, go to the Volume Mixer by clicking the speaker icon in the taskbar, then click Mixer. Click the Mute Speaker icon.

•Problem: When you connect a headphone to your computer while playing sound, a speaker does not produce sound in the MULTI-STREAM mode at Realtek HD Audio Manager.

Solution: Once the headphone is attached, the streaming is automatically redirected to it. If you want to listen to sound from the speakers again, be sure to set those speakers as the default device. The procedure is as follows:

1.Open Control Panel. Click Hardware and Sound.

2.Click the Realtek HD Audio Manager icon. The Realtek HD Audio Manager window opens.

3.Look at the tabs of playback devices. If you have attached a headphone, the headphone will be automatically set as the default device, and the headphone tab icon will be checked.

4.To set a different device as the default, click the speaker tab. Click the Set Default Device drop down list box. Select Set Default Device. That speaker tab icon will now have a check mark.

5.Play any sound by use of a music program such as Windows Media Player. Ensure that sound comes from the speakers.

For details, refer to the help information system for Realtek HD Audio Manager.

Fingerprint reader problems

•Problem: The surface of the reader is dirty, stained, or wet.

Solution: Gently clean the surface of the reader with a dry, soft, lint-free cloth.

•Problem: The reader often fails to enroll or authenticate your fingerprint.

Solution: If the surface of the reader is dirty, stained, or wet, gently clean the surface of the reader with a dry, soft, lint-free cloth.

For tips on how to maintain the fingerprint reader, refer to “Using the fingerprint reader” on page 54.

Battery and power problems

This topic contains instructions on troubleshooting battery and power problems.

Battery problems

•Problem: The built-in battery cannot be fully charged in the standard charge time when the computer is powered off.

Solution: The battery might be over-discharged. Do the following:

1.Turn off the computer.

2.Connect the ac power adapter to the computer and let it charge.

If a quick charger is available, use it to charge the over-discharged built-in battery.

If the built-in battery cannot be fully charged in 24 hours, call Lenovo Customer Service Center to have it serviced.

•Problem: Your computer shuts down before the battery-status icon shows that the battery is empty, or the computer operates after the battery-status icon shows that the battery is empty.

Chapter 10. Troubleshooting computer problems 119

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Lenovo S540 manual Fingerprint reader problems, Battery and power problems, Battery problems
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S540 specifications

The Lenovo S540 is a sophisticated laptop designed for both performance and portability, making it an excellent choice for professionals and students alike. This device showcases a blend of modern aesthetics and powerful functionality, representing a notable entry in Lenovo's versatile lineup.

At the heart of the Lenovo S540 lies an Intel Core processor, available in multiple configurations, enabling users to select the level of performance that best suits their needs. These processors deliver exceptional speed and responsiveness, allowing users to seamlessly handle demanding tasks such as video editing, graphic design, or multitasking across various applications.

One of the standout features of the S540 is its stunning display. The laptop offers a Full HD display with vibrant colors and sharp details, whether you are watching movies, editing photos, or simply browsing the web. The narrow bezels around the screen enhance the viewing experience, making it an immersive option for both work and entertainment.

In terms of design, the Lenovo S540 boasts a sleek and lightweight chassis, making it ideal for on-the-go usage. Weighing in at just over 3.5 pounds, it easily fits into backpacks or briefcases, perfect for commuters or students moving between classes. The premium build quality ensures that it not only looks good but can also withstand daily wear and tear.

Battery life is another highlight, with the S540 offering impressive longevity that can last up to 12 hours on a single charge. This capability is crucial for users who may not have immediate access to a power source while out and about. Furthermore, it features rapid charge technology allowing users to recharge the battery quickly when needed.

Connectivity options on the S540 are generous, including USB-C, USB 3.1, HDMI, and a headphone/microphone combo jack. These ports facilitate easy connection to a variety of devices and peripherals, enhancing the overall usability of the laptop.

The Lenovo S540 also makes considerable use of modern technologies such as Intelligent Cooling, which adjusts performance and efficiency based on usage patterns, and TrueBlock Privacy Shutter, providing users with physical protection for the webcam when not in use.

With its balance of style, performance, and innovative features, the Lenovo S540 stands out as a formidable option in the competitive landscape of ultrabooks, making it a prime choice for anyone in need of a reliable and capable laptop.
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