Power Button Led Behavior - Dell P80F003 Service Manual

● External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives
● Portable USB 3.0/USB 3.1 Gen 1 Hard Drives
● USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters
● USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers
● USB 3.0/USB 3.1 Gen 1 Solid-state Drives
● USB 3.0/USB 3.1 Gen 1 RAIDs
● Optical Media Drives
● Multimedia Devices
● Networking
● USB 3.0/USB 3.1 Gen 1 Adapter Cards & Hubs
Compatibility
The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0.
First of all, while USB 3.0/USB 3.1 Gen 1 specifies new physical connections and thus new cables to take advantage of the
higher speed capability of the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0
contacts in the exact same location as before. Five new connections to carry receive and transmitted data independently are
present on USB 3.0/USB 3.1 Gen 1 cables and only come into contact when connected to a proper SuperSpeed USB connection.
Windows 10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows,
which continue to require separate drivers for USB 3.0/USB 3.1 Gen 1 controllers.

Power button LED behavior

On certain Dell Latitude systems, the power button LED is used to provide an indication of the system status, and as a result the
power button illuminates when pressed. The systems with the optional power button/fingerprint reader will have no LED under
the power button and hence will apply the available LED's in the system to provide an indication of the system status.
Power button LED behavior without Fingerprint reader
● System is ON (S0) = LED illuminates solid white.
● System in Sleep/Standby (S3, SOix) = LED is off
● 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:
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