IBM THINKPAD S05L-1270-01 - Manual (Page 578)

turn on and the test fails, replace the FRU shown by the
diagnostic error code.
Fn Key Combinations
The following table shows the Fn key and function key
combinations and their corresponding functions.
The Fn key works independently from the operating
system. The operating system obtains the status through
the system management interface to control the system.
Fn + Description
F1 Reserved
F2 Fuel-Gauge display on or off
F3 Standby mode invocation
F4 Suspend mode invocation
F5 Reserved
F6 Reserved
F7 Switching display between LCD and CRT
F8 Switching display between expansion and
shrink
F9 Reserved
F10 Reserved
F11 Switching power management mode
(High Performance, Automatic, and
Customized)
F12 Hibernation invocation
566 IBM Mobile Systems HMM