ThinkPad T510 and T520 laptop servers LED indicators

This section contains information about LEDs that are on the T510 and T520 laptops. This information is also in the ThinkPad T510, T510i, and W510 Hardware Maintenance Manual and Hardware Maintenance Manual ThinkPad® T520, T520i, and W520, which are included on the service documentation CD that is part of the ship group. The CD should be stored in the document box at the front upper left corner of Rack-1. Although the condition of LEDs might indicate a failure, the LEDs should not be used as a starting point for a repair.

Status indicators

The system status indicators, shown in Figure 1, show the status of the computer. Table 1 lists the definitions of the status indicators.

Figure 1. Status indicators

Table 1. Status indicators

Status indicator	Definition
Speaker mute	Orange The speaker is on mute. To set the speakers on mute or unmute, press the speaker mute button.
Microphone mute	Orange The microphone is on mute. None of the recording devices is available while the microphone mute is on by default.
Wireless LAN, Wireless WAN, or WiMAX status	Green The wireless LAN feature (the IEEE 802.11 b/g standard, 802.11 a/b/g, or 802.11n), wireless WAN feature, or WiMax feature is on, and the radio link is ready for use. Blinking green Data is being transmitted.
Bluetooth wireless or Wireless USB status	Green The Bluetooth wireless feature is on, and the radio link is ready for use. Blinking green Data is being transmitted.
Device access	Green Data is being read from or written to the hard disk drive, the diskette drive, or the drive in the Serial Ultrabay Enhanced device. When this indicator is on, do not put the computer into sleep (standby) mode or turn off the computer. Note: Do not move the system while the green device access light is on. Sudden physical shock could cause drive errors.
Power on	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.
Serial Ultrabay Enhanced device status	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.
Fingerprint reader status	Green The fingerprint reader is ready to swipe. Blinking green The fingerprint is being authenticated or has been authenticated. Turn off The fingerprint could not be authenticated.
Caps lock	Green Caps Lock mode is enabled. To enable or disable Caps Lock mode, press the Caps Lock key.
Sleep (standby for Windows XP) status	Green The computer is in sleep (standby) mode. Blinking green The computer is entering sleep (standby) mode or hibernation mode, or is resuming normal operation.
Battery status	Green The battery has more than 20% charge. Orange The battery has between 5% and 20% charge. Fast-blinking orange The battery has less than 5% charge. Note: The battery may be charging. Slow-blinking orange The battery is being charged. When it reaches 20%, the blinking color changes to green. Slow-blinking green The battery has between 20% and 80% charge, and charging is continuing. When the battery reaches 80% charge, blinking stops, but the charging may continue until the battery is 100% charged. Note: If the computer is operating on battery power, the battery status indicator does not work while the computer is turned off or is in sleep (standby) mode or hibernation mode. Quick-blinking orange An error has occurred in the battery. The battery status indicator is off The battery pack of the computer is detached.
Color sensor status	Green Calibration is complete. When the lid is opened, the indicator turns off. Blinking green Display colors are being calibrated.