Dell Latitude 5500 Service Manual page 14

• System is Off/Hibernating (S4/S5) = LED is off
Power On and LED behavior with Fingerprint reader
• Pressing the power button for a duration between 50 msec to 2 sec turns on the device.
• Power button does not register additional presses until the SOL (Sign-Of-Life) has been provided to the user.
• System LED's illuminates upon pressing the power button.
• All the available LED's (Keyboard backlit/ Keyboard caps lock LED/ Battery Charge LED) illuminates and displays specified behavior.
• The auditory tone is Off by default. It can be enabled in the BIOS setup.
• Safeguards do not time out if the device gets hung during the logon process.
• Dell logo: Turns on within 2 secs after pressing the power button.
• Full boot: Within 22 secs after pressing the power button.
• Below is the example timelines:
Power button with fingerprint reader will have no LED and will leverage the available LED's in the system to provide indication of the
system status
• Power Adapter LED:
• The LED on Power adapter connector illuminates white when power is supplied from electrical outlet.
• Battery Indicator LED:
• If the computer is connected to an electrical outlet, the battery light operates as follows:
1. Solid white -the battery is charging. When the charge is complete the LED turns off.
• If the computer is running on a battery, the battery light operates as follows:
1. Off -the battery is adequately charged (or the computer is turned off).
2. Solid amber -the battery charge is critically low. A low battery state is approximately 30 minutes or less of battery life
remaining.
14 Technology and components