Hibernation Mode; Symptom-To-Fru Index - Lenovo ThinkPad T61 Hardware Maintenance Manual

Hibernation mode

In hibernation mode, the following occurs:
v The system status, RAM, VRAM, and setup data are stored on the hard disk.
v The system is powered off.
Note: If the computer enters the hibernation mode while it is docked to the
ThinkPad Advanced Dock or ThinkPad Advanced Mini Dock, 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:
v Press the Fn+F12 keys.
v If you are using the APM operating system and have set the mode to Power
v If you are using the ACPI operating system and have defined one of the
Also, the computer goes into hibernation mode automatically in either of the
following conditions:
v If a "hibernation time" has been set on the timer, and if the user does not do
v If the timer conditions are satisfied in suspend mode.
v If you are using the APM operating system and have set the mode to Hibernate
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:
v "Numeric error codes" on page 37
v "Error messages" on page 41
v "Beep symptoms" on page 42
v "No-beep symptoms" on page 42
v "LCD-related symptoms" on page 43
v "Intermittent problems" on page 43
v "Undetermined problems" on page 44
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.
36
ThinkPad T61, R61, and R61i (14.1-inch widescreen) Hardware Maintenance Manual
Note: The computer does not accept any input immediately after it enters
standby mode. Wait a few seconds before taking any action to reenter operation
mode.
switch mode [Hibernation], turn off the power switch.
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.
any operation with the keyboard, the TrackPoint, the hard disk drive, the
parallel connector, or the diskette drive within that time.
when battery becomes low, and the battery charge becomes critically low.