Lenovo T420 Maintenance Manual page 59

Table 7. Status indicators (continued)
Indicator
Power on
6
Numeric lock (On-screen
7
indicator)
Serial Ultrabay Enhanced
8
device status
Caps lock
9
Meaning
Green:
The computer is on and ready to use. This indicator stays lit
around the power-on button whenever the computer is on and
is not in sleep (standby) mode.
Note: This indicator blinks when the computer is in sleep mode.
By default, when the numeric lock is on, the numeric lock indicator is
displayed on the screen.
Green:
A Serial Ultrabay Enhanced device is installed and in use.
Blinking green:
A Serial Ultrabay Enhanced device is in the process of being
detached.
Turn off:
A Serial Ultrabay Enhanced device is ready to be attached or
detached.
Green:
Caps Lock mode is enabled. To enable or disable Caps Lock
mode, press the Caps Lock key.
.
Chapter 5 Status indicators
53