Lenovo ThinkPad SL400 Hardware Maintenance Manual - Page 60

Status, indicators

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Status indicators The system status indicators show the status of the computer, as follows: 1 10 9 8 7 6 2 3 4 5 Table 8. Status indicators Indicator 1 Power on 2 Device access 3 Media Card Reader 4 Numeric lock 5 CapsLock Meaning The computer is on and ready to use. The power switch stays lit whenever the computer is on and is not lit when the computer is in sleep (standby) mode. A hard disk drive is being used to read or write data. When this indicator is blinking, do not put the computer into sleep (standby) mode or turn it off. Note: Do not move the system while the green drive-in-use light is on. Sudden physical shock could cause drive errors. A card in the 7-in-1 Media Card Reader is being used to read and write data. When this indicator is blinking, do not put the computer into sleep mode, remove the card from the slot, or turn off the computer. The numeric keypad on the keyboard is enabled. To enable or disable the keypad, press and hold the Shift key or Fn key, and press the NumLk (Delete) key. CapsLock mode is enabled. You can enter all alphabetic characters (A-Z) in uppercase without pressing the Shift key. To enable or disable CapsLock mode, press and hold the Shift key, and press the CapsLock key. 52 ThinkPad SL400 and SL500Hardware Maintenance Manual

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Status
indicators
The
system
status
indicators
show
the
status
of
the
computer,
as
follows:
1
2
3
4
5
6
7
8
9
10
Table
8.
Status
indicators
Indicator
Meaning
±1²
Power
on
The
computer
is
on
and
ready
to
use.
The
power
switch
stays
lit
whenever
the
computer
is
on
and
is
not
lit
when
the
computer
is
in
sleep
(standby)
mode.
±2²
Device
access
A
hard
disk
drive
is
being
used
to
read
or
write
data.
When
this
indicator
is
blinking,
do
not
put
the
computer
into
sleep
(standby)
mode
or
turn
it
off.
Note:
Do
not
move
the
system
while
the
green
drive-in-use
light
is
on.
Sudden
physical
shock
could
cause
drive
errors.
±3²
Media
Card
Reader
A
card
in
the
7-in-1
Media
Card
Reader
is
being
used
to
read
and
write
data.
When
this
indicator
is
blinking,
do
not
put
the
computer
into
sleep
mode,
remove
the
card
from
the
slot,
or
turn
off
the
computer.
±4²
Numeric
lock
The
numeric
keypad
on
the
keyboard
is
enabled.
To
enable
or
disable
the
keypad,
press
and
hold
the
Shift
key
or
Fn
key,
and
press
the
NumLk
(Delete)
key.
±5²
CapsLock
CapsLock
mode
is
enabled.
You
can
enter
all
alphabetic
characters
(A-Z)
in
uppercase
without
pressing
the
Shift
key.
To
enable
or
disable
CapsLock
mode,
press
and
hold
the
Shift
key,
and
press
the
CapsLock
key.
52
ThinkPad
SL400
and
SL500Hardware
Maintenance
Manual