Lenovo ThinkPad R51 2888 Supplementary Manual page 41

mode to allow the computer to cool and to protect the processor and other
internal components. Also, check the settings for standby mode, using
Power Manager.
Problem:
The computer enters standby mode immediately after Power-on self-test
(POST) (the standby indicator light turns on).
Solution:
Make sure that:
v The battery is charged.
v The operating temperature is within the acceptable range. Refer to
"Specifications" on page 4.
If these items are correct, have the computer serviced.
Problem:
The critical low-battery error message is displayed, and the computer
immediately turns off.
Solution:
The battery power is getting low. Connect the ac adapter to the computer,
or replace the battery with a fully charged one.
Problem:
When you take action to return from standby mode, the computer display
remains blank.
Solution:
Check whether an external monitor was disconnected while the computer
was in standby mode. Do not disconnect the external monitor while the
computer is in standby mode or hibernation mode. If no external monitor
is attached when the computer resumes, the computer display remains
blank and output is not displayed. This restriction does not depend on the
resolution value. Press Fn+F7 to bring up the computer display.
Note: If you use the Fn+F7 key combination to apply a presentation
scheme, press Fn+F7 at least three times in three seconds, and the
image is displayed on the computer screen.
Problem:
The computer does not return from standby mode, or the standby
indicator stays on and the computer does not work.
Solution:
If the system does not return from standby mode, it may have entered
standby or hibernation mode automatically because the battery is depleted.
Check the standby indicator.
v If the standby indicator is on, your computer is in standby mode.
Connect the ac adapter to the computer; then press Fn.
Solving computer problems
Chapter 2. Solving computer problems
19