Also, in either of the following events, the computer automatically returns from sleep (standby) mode and resumes operation:

vThe ring indicator (RI) is signaled by a serial device or a PC Card device.

vThe time set on the resume timer elapses.

Note: The computer does not accept any input immediately after it enters sleep (standby) mode. Wait a few seconds before taking any action to reenter operation mode.

Hibernation mode

In hibernation mode, the following occurs:

vThe system status, RAM, VRAM, and setup data are stored on the hard disk.

vThe system is powered off.

Note: If the computer enters the hibernation mode while it is docked to the docking station, do not undock it before resuming normal operation. If you do undock it and then try to resume normal operation, you will get an error message, and you will have to restart the system.

To cause the computer to enter hibernation mode, do any of the following:

vPress the Fn+F12 keys.

vIf you have defined one of the following actions as the event that causes the system to go into hibernation mode, perform that action.

Closing the lid.

Pressing the power button.

Pressing Fn+F4 keys.

Also, the computer goes into hibernation mode automatically in either of the following conditions:

vIf a “hibernation time” has been set on the timer, and if the user does not do any operation with the keyboard, the TrackPoint, the hard disk drive, the parallel connector, or the diskette drive within that time.

vIf the timer conditions are satisfied in suspend mode.

When the power is turned on, the computer returns from hibernation mode and resumes operation. The hibernation file in the boot record on the hard disk drive is read, and system status is restored from the hard disk drive.

Related service information

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Lenovo R400 manual Hibernation mode

R400 specifications

The Lenovo R400 is a business laptop that was designed for professionals seeking a balance of performance, durability, and mobility. It is part of Lenovo's renowned ThinkPad series, which is known for its robust build quality and user-centric features. The R400 combines an array of technologies and characteristics that cater specifically to the demands of the modern workplace.

One of the standout features of the Lenovo R400 is its powerful processor options. Depending on the configuration, it can be equipped with Intel Core 2 Duo processors, which provide efficient multitasking capabilities and commendable performance for typical business applications. This ensures that users can run multiple applications seamlessly, whether it’s for data analysis, presentations, or video conferencing.

In terms of design, the R400 maintains the classic ThinkPad aesthetic with a lightweight chassis that makes it portable for professionals on the go. It typically weighs around 5.2 pounds, making it convenient for travel while still offering a sturdy construction that can withstand daily use. The spill-resistant keyboard is another practical characteristic, enabling users to work without worrying about minor accidents. The keyboard itself is celebrated for its comfortable layout and tactile feedback, ideal for prolonged typing sessions.

The display is another critical aspect of the R400. It generally features a 14.1-inch widescreen model, providing adequate screen real estate for productivity tasks. With a resolution of 1440 x 900, the screen delivers crisp visuals and vibrant colors, enhancing the viewing experience for both presentations and media consumption.

Connectivity is robust, with multiple USB ports, Ethernet, and optional Bluetooth capabilities that facilitate seamless communication and file transfers. The presence of both VGA and display port outputs makes it easy to connect to projectors or external monitors, an essential feature for professional presentations.

Security features also play a crucial role in the R400's design. It typically offers features like a fingerprint reader, a Trusted Platform Module (TPM) for data encryption, and a robust BIOS that helps safeguard sensitive information, which is critical for professionals handling confidential data.

In summary, the Lenovo R400 stands out as a reliable business laptop, blending performance, durability, and features tailored to meet the needs of the modern workforce. Its powerful processing capabilities, user-friendly design, and robust security measures make it an attractive choice for professionals requiring a dependable and efficient mobile computing solution.