Lenovo Z61t - Manual (Page 28)

Standby or hibernation problems
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 54.
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 or turned off while the computer
was in standby mode. If you disconnected or turned off the external monitor, connect it
or turn it on before resuming the computer from the standby mode. When resuming the
computer from the standby mode without attaching the external monitor or turning it
on, and the computer display remains blank, 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 or hibernation mode.
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 any key.
v If the standby indicator is off, your computer is in hibernation mode or power-off
state. Connect the ac adapter to the computer; then press power button to resume
operation.
If the system still does not return from standby mode, your system may stop responding
and you cannot turn off the computer. Reset the computer. Unsaved data may be lost. To
reset the computer, press and hold the power button for 4 seconds or more. If it is not
reset, remove the ac adapter and the battery.
Solving computer problems
20 ThinkPad ® Z61 Service and Troubleshooting Guide