- Notes, cautions, and warnings
- Major components of your system
- Working on your computer
- Removing and installing components
- Recommended tools
- Screw List
- Disassembly and reassembly
- MicroSD card
- Base cover
- Battery
- WLAN card
- WWAN card
- Coin-cell battery
- Memory modules
- DC-in port
- Solid-state drive
- Solid state drive bracket
- Inner frame
- Touchpad buttons
- LED board
- Speakers
- Heatsink assembly
- System fan
- System board
- Keyboard assembly
- Keyboard bracket
- Power button
- Display assembly
- Display bezel
- Display panel
- Camera
- Hinge caps
- Display hinges
- Display (eDP) cable
- Display back cover
- Palmrest assembly
- Troubleshooting
- Getting help and contacting Dell
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Dell Latitude 5400 Chromebook Service Manual
Diagnostics
This chapter details the built in troubleshooting features to diagnose the Dell Latitude 5400 Chromebook systems. It also lists the invoking instructions along with related information for each diagnostics method.
ePSA Diagnostics
The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded with the BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular devices or device groups allowing you to:
- Run tests automatically or in an interactive mode
- Repeat tests
- Display or save test results
- Run thorough tests to introduce additional test options to provide extra information about the failed device(s)
- View status messages that inform you if tests are completed successfully
- View error messages that inform you of problems encountered during testing
NOTE The
Enhanced Pre-boot System Assessment
window displays, listing all devices detected in the computer. The diagnostics starts running the tests on all the detected devices.
Running ePSA diagnostics
- Press and Hold the Power and F2 to boot into Chrome OS recovery menu.
- Press
F12 or
Ctrl + C key on the keyboard to go to diagnostics screen.
- Press the
Power button to launch ePSA.
ePSA User Interface
This section contains information on ePSA 3.0’s Basic and Advanced Screen.ePSA opens basic screen on start. You can switch to advanced screen using the arrow icon on the bottom. Advanced screen shows detected devices on the left column. Specific test can be included or excluded only in the interactive mode.
ePSA Basic Screen
The Basic Screen has minimal controls which allows easy navigation for user to start or stop the diagnostic.
LCD Test
The ePSA starts with LCD pixel test, where color bars are displayed on the screen. Check for any flaws with pixels on the screen
- Dead Pixels: Black dot
- Bright Pixels: Bright dot
Confirm the LCD functionality by pressing Yes or No on the next screen.
ePSA Advanced Screen
The advanced screen allows more directed testing and contains more detail information about the overall health of the system. The user can get to this screen by simply swiping your finger to the left on touchscreen systems or clicking the next page button on the lower right hand side of the basic screen.
To run test on specific device or run a specific test
- To run a diagnostic test on a specific device, press Esc and click Yes to stop the diagnostic test.
- Select the device from the left pane and click Run Tests or use Advanced Option to include or exclude any Test.
ePSA Error Messages
When the Dell ePSA Diagnostic detects an error while running, it will pause the test and then popup a window as shown below :
NOTE If all the test passes you get a QR code to show the test results.
- By responding to Yes, the diagnostic will continue testing the next device and the error details will be available in the summary report.
- By responding to No, the diagnostic will stop testing the remaining untested device.
- By responding to Retry, the diagnostic will ignore the error and rerun the last test.
Capture the error code with Validation code or Scan QR code and Contact Dell
NOTE As part of the new feature, user can now mute the beeping sound code when there is an error , by pressing on
at the bottom right side of the error window.
at the bottom right side of the error window.
NOTE Some tests for specific devices require user interaction. Always ensure that you are present at the computer terminal when the diagnostic tests are performed.
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