Lenovo ThinkPad S540 Hardware Maintenance Manual page 50

Table 7. Status indicators (continued)
Indicator
4 6
System status indicator
5
Fn Lock indicator
44
Hardware Maintenance Manual
Meaning
Blinking three times: The computer is initially connected to power.
On: The computer is in use.
Off: The computer is off or in hibernation mode.
Slow blinking: The computer is in sleep mode.
Fast blinking: The computer is entering sleep or hibernation mode.
Off (default mode): The Fn Lock function is disabled. To initiate the special
function of each key, press the corresponding function key directly. To input F1-
F12, press the Fn key and the corresponding function key.
On (legacy mode): The Fn Lock function is enabled. To input F1- F12, press the
corresponding function key directly. To initiate the special function of each key,
press the Fn key and the corresponding function key.