A power button problem

•Problem: The system does not respond, and you cannot turn off the computer.

Solution: Turn off the computer by pressing and holding the power button for 4 seconds or more. If the system is still not reset, remove the ac power adapter and the battery.

Startup problems

Print these instructions now and keep them with your computer for reference later.

If you receive an error message before the operating system loads, check the following item:

• Follow the appropriate corrective actions for Power-on self-test error messages.

If you receive an error message while the operating system is loading the desktop configuration after the POST is completed, check the following items:

1.Visit the Lenovo Support Web site at http://www.lenovo.com/support and search for the error message.

2.Visit the Microsoft Knowledge Base homepage at http://support.microsoft.com/ and search for the error message.

Sleep (standby) and hibernation problems

•Problem: The computer enters sleep (standby) mode unexpectedly.

Solution: If the processor overheats, the computer automatically enter sleep (standby) mode to allow the computer to cool and to protect the processor and other internal components. Check the settings for sleep (standby) mode, using Power Manager.

•Problem: The computer enters sleep (standby) mode (the sleep/standby indicator turns on) immediately after Power-on self-test.

Solution: Make sure that:

–The battery is charged.

–The operating temperature is within the acceptable range. Refer to “Features” on page 27, “Specifications” on page 30, and “Operating environment” on page 32.

If the battery is charged and the temperature is within range, have the computer serviced.

•Problem: The “critical low-battery error” message appears, and the computer immediately turns off.

Solution: The battery power is getting low. Connect the ac power adapter to the computer and plug it into an electrical outlet, or replace the battery with a charged one.

•Problem: The computer display remains blank after you press Fn to return from sleep (standby) mode.

Solution: Check whether an external monitor was disconnected or turned off while the computer was in sleep (standby) mode. If you disconnected or turned off the external monitor, connect it or turn it on before resuming the computer from the sleep (standby) mode. When resuming the computer from the sleep (standby) mode without attaching the external monitor or turning it on, and the computer display remains blank, press Fn+F7 to bring up the computer display.

Note: If you are using Fn+F7 to apply a presentation scheme, you will need to press Fn+F7 at least three times in three seconds to bring up the computer display.

Note: If your computer is a Windows 7 model, it does not support the presentation scheme.

•Problem: The computer does not return from sleep (standby) mode, or the sleep (standby) indicator stays on and the computer does not work.

Chapter 10. Troubleshooting computer problems 231

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Lenovo 429040 manual Power button problem, Startup problems, Sleep standby and hibernation problems
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429040 specifications

The Lenovo 429040 is an innovative laptop model that caters to both business professionals and casual users alike, combining portability, performance, and design. This device is engineered to meet the demands of modern computing, making it a standout option in the competitive laptop market.

One of the main features of the Lenovo 429040 is its sleek and lightweight design. Weighing just around 3.5 pounds, it is incredibly portable, making it easy to carry for on-the-go professionals or students. The laptop sports a robust chassis made from durable materials, ensuring longevity while also maintaining a modern aesthetic. The design incorporates a high-resolution display, typically a Full HD IPS panel, which offers vibrant colors and wide viewing angles. This is perfect for both work presentations and multimedia consumption.

Under the hood, the Lenovo 429040 is equipped with powerful processing capabilities. It often comes with the latest Intel or AMD processors, providing the necessary power for multitasking and demanding applications. Coupled with significant RAM options, typically ranging from 8GB to 16GB, users can run multiple applications simultaneously without experiencing slowdown. This makes it ideal for tasks such as video editing, software development, and heavy browsing.

In terms of storage, the Lenovo 429040 generally features fast SSD options, enhancing overall system responsiveness and boot times. With storage capacities ranging from 256GB up to 1TB, users have ample space not only for their operating system but also for applications and personal files.

Moreover, the laptop incorporates advanced technologies such as Wi-Fi 6 for faster internet connectivity and Bluetooth compatibility for seamless wireless connections with peripherals. The battery life is another significant characteristic, often lasting up to 12 hours on a single charge, allowing users to work or enjoy media without constantly seeking power outlets.

The keyboard of the Lenovo 429040 is designed for comfort, featuring backlit keys that facilitate typing in low-light conditions, along with a responsive touchpad. Security features such as a fingerprint reader and optional AI-based security enhancements are additional highlights that ensure data protection.

Overall, the Lenovo 429040 stands out for its combination of style, performance, and practicality, making it a reliable choice for those looking for a capable laptop that can adapt to various usage scenarios. Whether for business tasks, educational purposes, or entertainment, it delivers a well-rounded experience.
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