Problem: Ripple on screen.

Troubleshooting and problem resolution:

1.Check to see if any of the following devices are located less than one meter from the computer: refrigerators, electric fans, electric dryers, UPS systems, regulators, fluorescent lamps or other computers that may be generating magnetic interference.

2.Move any interfering devices away from the computer.

3.If the problem persists, contact Lenovo Service.

Troubleshooting Audio Problems

Problem: No sound from the integrated speakers.

Troubleshooting and problem resolution:

•Adjust the Windows volume control — select the speaker icon from the

Settings Charm or click the arrow on taskbar to show the hidden icons in Windows desktop mode, then click the speaker icon. Ensure that the volume is turned up and the sound is not muted. Adjust the volume, bass, or treble controls to eliminate distortion.

•Reinstall the audio driver.

•Disconnect any headphones from the headphone connector — sound from the speakers is automatically disabled when headphones are connected to the computer’s side-panel headphone connector.

Problem: No sound from headphones.

Troubleshooting and problem resolution:

•Check the headphone cable connection — ensure that the headphone cable is securely inserted into the headphone connector.

•Adjust the Windows volume control — select the speaker icon from the

Settings Charm or click the arrow on taskbar to show the hidden icons in Windows desktop mode, then click the speaker icon. Ensure that the volume is turned up and the sound is not muted.

User Guide 33

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Lenovo 10089/1168/4744 [K410], 10121/90A1 [K450 ES], 10120/90A0 [K450 NON-ES] manual Troubleshooting Audio Problems
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10120/90A0 [K450 NON-ES], 10121/90A1 [K450 ES], 10089/1168/4744 [K410], 10086/3109/4743 [K430], 10090/2556/4748 [K415] specifications

The Lenovo K series laptops, including the 10086/3109/4743 [K430], 10090/2556/4748 [K415], 10121/90A1 [K450 ES], 10120/90A0 [K450 NON-ES], and 10089/1168/4744 [K410], are noteworthy entries in the realm of multimedia laptops. Each model boasts a distinct set of features and technologies that cater to a range of user preferences, from casual browsing to robust multimedia tasks.

The K430 stands out with its sleek design and a high-definition display, offering vibrant visuals ideal for movies and photo editing. It is equipped with Intel's processors, ensuring smooth performance and energy efficiency. The inclusion of Dolby Home Theater technology enhances audio quality, providing immersive sound for entertainment enthusiasts. With ample storage options and an Intel HD graphics card, the K430 is suitable for both work and play.

Next is the K415, which features a slightly larger screen than the K430, making it a great choice for users who prefer a more expansive viewing experience. It combines functionality with aesthetics, offering a stylish look while being durable enough for everyday use. Key features include enhanced connectivity options, including USB 3.0 ports, which allow for fast data transfer and compatibility with a variety of peripherals. The K415 is designed for multitasking, equipped with sufficient RAM and a fast processor.

The K450 ES and K450 NON-ES models offer similar specifications, yet they cater to different market segments. The ES version includes enhanced security features, making it suitable for users concerned about data protection. Both models come equipped with high-performance components, ensuring they can handle demanding applications without compromising speed. They also incorporate Lenovo's proprietary AccuType keyboard, which provides better typing comfort and accuracy.

Finally, the K410 model appeals to users seeking a portable yet powerful machine. It is lightweight, making it ideal for students and professionals on the go. The K410 integrates Lenovo's OneKey Recovery system, facilitating data backup and restoring processes. It also features integrated Wi-Fi and Bluetooth connectivity for seamless online experiences and peripheral connection.

In summary, Lenovo's K series laptops are engineered to meet diverse computing needs. With their blend of performance, aesthetics, and user-friendly features, these models ensure that customers can find a laptop that perfectly fits their demands, whether for work, study, or entertainment.
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