Diagnostics - Dell LATITUDE E6400 XFR Service Manual

System Logs
Option
BIOS Events
DellDiag Events
Thermal Events
Power Events

41 Diagnostics

Diagnostic LED Codes The following table shows the possible LED codes that may display when your computer is
unable to complete a power on self test.
Appearance
Storage Power
LED LED
Blinking Solid
Solid Blinking
Blinking Blinking
Blinking Blinking
Blinking Blinking
Blinking Off
Solid Blinking
Blinking Solid
Off Blinking
Page 80
™
Dell Latitude™ E6420 XFR Service Manual
Description
Allows you to view and clear the System Setup (BIOS) POST events.
Allows you to view and clear the DellDiag events.
Allows you to view and clear the Thermal events.
Allows you to view and clear the Power events.
Description
Wireless
LED
Solid The microcontroller is
handing control of the
system to the processor.
This code persists if no
processor is detected.
Solid Memory is detected but has
errors.
Blinking System Board Error
Solid Video Card Error
Off Keyboard Error
Blinking USB Controller Error
Blinking No SODIMMs are installed
Blinking Display Panel Error
Blinking Modem Error
Next Step
Replace the processor.
1. Re-seat the memory.
2. If two modules are installed, remove one and
test. Try the other module in the same slot and
test. Test the other slot with both modules.
3. Replace the memory.
4. Replace the system board.
Replace the System Board.
Replace the System Board.
1. Re-seat the keyboard cable.
2. Replace the keyboard.
Unplug any USB devices attached
1. Install supported memory modules.
2. If memory is already present, re-seat the
module(s) one at a time in each slot.
3. Try known good memory from another
computer or replace the memory.
4. Replace the system board.
1. Re-seat the display cable.
2. Replace the display panel.
3. Replace the video card/system board.
1. Re-seat the modem.
2. Replace the modem.
3. Replace the system board.