Hibernation Mode; Symptom-To-Fru Index - Lenovo ThinkPad X131e Hardware Maintenance Manual

To enter sleep mode, press Fn+F4.
In certain circumstances, the computer goes into sleep mode automatically:
• After a period of inactivity specified in power plan settings
• When the battery indicator blinks orange, indicating that the battery power is low
To return from sleep mode, do one of the following:
• Press the Fn key.
• Open the LCD cover.
• Press the power button.
Also, in either of the following events, the computer automatically returns from sleep mode and resumes
operation:
• The ring indicator (RI) is signaled by a serial device or a PC Card device.
• The time set on the resume timer elapses.
Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few
seconds before taking any action to reenter operation mode.

Hibernation mode

In hibernation mode, the following occurs:
• The system status, RAM, VRAM, and setup data are stored on the hard disk.
• The system is powered off.
If 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 after a period of inactivity specified in power
plan settings.
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.

Symptom-to-FRU index

This section contains following information:
• "Numeric error codes" on page 36
• "Error messages" on page 37
• "No-beep symptoms" on page 38
• "LCD-related symptoms" on page 38
• "Intermittent problems" on page 38
• "Undetermined problems" on page 39
The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most
likely cause is listed first, in boldface type.
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Chapter 4 Related service information
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