hibernation file is not present  or invalid). The battery
power indicator blinks amber.
Events that cause the computer  to exit standby mode:
The LCD is opened.
The ring indicator (RI) is  signaled by a serial or
PCMCIA device.
Any key or pointing device  operation.
Note:   If the computer enters standby  mode and the
computer is using a communication  or I/O PC Card, the
PC Card and application program  remain active.
Hibernation Mode: When  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.
Events that cause the computer  to enter hibernation mode:
Hibernation requested by the Fn  key. (Fn+F8)
The specified time (hibernation timer  in the BIOS
Utility) has elapsed from the  last operation with the
keyboard, mouse, hard disk drive,  parallel connector,
or diskette drive.
A critical low battery condition  occurs and hibernation
is enabled (when Sleep Manager  is installed and the
hibernation file is present and  valid).
Note:   The computer cannot enter hibernation  mode
when a communication or I/O  PC Card is being used
by the computer.
Events that cause the computer  to exit hibernation mode:
The power-on switch is operated.
When power is turned on,  the hibernation history in
the boot record on the  hard disk is recognized and
system status is restored from  the hard disk to
resume operation.
    ThinkPad 310, 310D, 310E, 310ED (2600) 13