Lenovo Z60T - Manual (Page 46)

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.
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. In this case, you
need to reset the computer. If you have not saved your data, it may be
lost. To reset the computer, press and hold the power button for 4 seconds
or more. If the system is still not reset, remove the ac adapter and the
battery.
Problem:
Your computer does not enter standby or hibernation mode.
Solution:
Check whether any option has been selected that would disable your
computer from entering standby or hibernation mode.
Problem:
The system does not wake up at the time set on the timer, if the computer
is not connected to an ac power source, -or- The system does not enter
hibernation mode from suspend mode, if the computer is not connected to
an ac power source.
Solving computer problems
24 ThinkPad ® Z60t and Z60m Series Service and Troubleshooting Guide