IBM THINKPAD S05L-1270-01 - Manual (Page 464)

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 Reserved
F9 Reserved
F10 Reserved
F11 Switching power management mode
(High Performance, Automatic, and
Customized)
F12 Hibernation invocation
452 IBM Mobile Systems HMM