Dell Latitude E7240 and E7440 LED Features and Diagnostic Status Lights
Summary: This page contains a Guide to the LED's on the Dell Latitude E7240 and E7440 models
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Symptoms
This article explains the Latitude E7240 / E7440: LED Features and Diagnostic Status Lights
Top Cover LEDs
The three LED indicator lights on the top cover and above the keyboard of the system specify the following:
LED Features
1. Power light - Computer power management indicator.
| Power State | LED Behavior |
|---|---|
| On |
Solid white |
| Standby |
Breathe white (slow increase/decrease in illumination) |
| Hibernate |
Off |
2. HDD activity light - Hard drive activity indicator. Blinking white when the laptop reads or writes data.
Note: To avoid data loss, users should never turn off the laptop while the HDD activity indicator is flashing.
3. Battery light - Battery power management indicator.
| Battery State | LED Behavior | Action |
|---|---|---|
| An unauthenticated or unsupported non-Dell AC adapter is attached to your notebook. |
Alternately blinking amber light and white light |
Try testing the notebook with a known good adapter. Where possible test the system on a docking station to see if the error changes. |
| Temporary battery failure with AC adapter present. |
Alternately blinking amber light with steady white light |
Try re-seating the battery where possible. If available test the system with a known good battery to see if the error changes. Try running the online battery diagnostics. |
| Fatal battery failure with AC adapter present. |
Constantly blinking amber light |
Try re-seating the battery where possible. If available test the system with a known good battery to see if the error changes. Try running the online battery diagnostics. If this error remains the battery will need to be replaced. See article Notebook Battery Warranty Support |
| Battery in full charge mode with AC adapter present. |
Light off |
No action required battery fully charged. |
| Battery in charge mode with AC adapter present. |
White light on |
No action required battery charging as normal. |
Note: If the system is suffering from a No POST issue please see the following article:
Affected Products
Latitude E7240 Ultrabook, Latitude E7440Article Properties
Article Number: 000142744
Article Type: Solution
Last Modified: 05 Dec 2020
Version: 3
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