IBM THINKPAD 760C/CD (9546) - Manual (Page 226)

PC Test Card LED
The green LED on the PC test card turns on when the
PCMCIA test is running. If the LED does not turn on,
check that the card is installed correctly by reseating the
card. If it still does not turn on after it is reseated, try
using another slot for the test. If the LED still does not
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 LCD/CRT display switching
F8 Screen expansion on or off (no symbol on
the key)
F9 Reserved
F10 Reserved
F11 Power management mode switching
(toggles High Power, Intelligent, Economy)
F12 Hibernation invocation
214 IBM Mobile Systems - ThinkPad HMM Volume 3