Dell Latitude 3540, Service Manual

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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.
• Camera LED
– White LED activates when camera is on.
• Mic Mute LED:
– When activated (muted), the mic mute LED on the F4 Key should illuminate WHITE.
• RJ45 LEDs:
–
Table 2. LED on either side of RJ45 port
Link speed indicator (LHS) Activity indicator (RHS)
Green Amber
16 Technology and components