Lenovo ThinkPad E555 - Manual (Page 56)

Table 7. Status indicators (continued)
Indicator Description
4 and 6 System-status
indicator
Blinks for three times: The computer is initially connected to power.
On: The computer is on (in normal mode).
Off: The computer is off or in hibernation mode.
Blinks slowly: The computer is in sleep mode.
Blinks fast: The computer is entering hibernation mode.
5 Fn Lock indicator On: The Fn Lock function is enabled. To initiate the special function of each key, press
the Fn key and the corresponding function key. To input F1-F12, press the function
keys directly.
Off: The Fn Lock function is disabled. To initiate the special function of each key, press
the function keys directly. To input F1-F12, press the Fn key and the corresponding
function key.
50 Hardware Maintenance Manual