ThinkPad T420 - Page 60

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Table7.Statusindicators
IndicatorMeaning
1
Speakermute
Orange:
Thespeakerisonmute.Tosetthespeakersonmuteorunmute,
pressthespeakermutebutton.
2
Microphonemute
Orange:
Themicrophoneisonmute.Noneoftherecordingdevicesis
availablewhilethemicrophonemuteisonbydefault.
3
WirelessLAN,WirelessWAN,
orWiMAXstatus
Green:
ThewirelessLANfeature(theIEEE802.11b/gstandard,802.11
a/b/g,or802.11n),wirelessWANfeature,orWiMaxfeatureis
on,andtheradiolinkisreadyforuse.
Dataisbeingtransmitted.
4
BluetoothwirelessorWireless
USBstatus
R
Green:
TheBluetoothwirelessfeatureison,andtheradiolinkisready
foruse.
Dataisbeingtransmitted.
5
Deviceaccess
Green:
Dataisbeingreadfromorwrittentotheharddiskdrive,the
diskettedrive,orthedriveintheSerialUltrabayEnhanced
device.Whenthisindicatorison,donotputthecomputerinto
sleep(standby)modeorturnoffthecomputer.
Note:Donotmovethesystemwhilethegreendeviceaccesslightison.
Suddenphysicalshockcouldcausedriveerrors.
54ThinkPadT420andT420iHardwareMaintenanceManual
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