A Reference Guide for Latitude Laptop and Tablet Diagnostic Indicators

概要: This article provides details about the diagnostic LED codes for Latitude laptops and tablets.

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Dell Latitude laptops have various integrated visible and audible diagnostic indicators to help identify possible failure of hardware components causing specific symptoms. Most of these symptoms are related to the laptop not being able to boot to Windows, displaying a black screen from startup, and so on.

Note: Some laptops use a sequence of audible beeps to give an indication about possible hardware failure. See the beep codes table in this article to diagnose and troubleshoot your computer.

Various reasons for computers experiencing startup issues can be found in the following article. This is in addition to the information and solutions offered in the section below.

Resolve No Power, No POST, No Boot or No Video issues with your Dell Computer

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Battery LED Light Status on Latitude Laptops

Latitude Battery Status

The battery charge LED light turns white or amber to indicate the power status and remaining battery charge. See the tables below.

Table 1: Battery charge LED status lights on current Latitude laptops
LED Light Description
1	Battery status light

Latitude battery LED state

Note: Learn How to Troubleshoot Dell Laptop Battery Issues for battery or battery changing issues.

If the laptop is connected to an electrical outlet, the battery light operates as follows:

Table 2: Battery LED status if AC adapter is connected to current Latitude laptops.
System Power State	Battery Charge Level	LED Behavior
S0 - S5	Fully Charged	Off
S0 - S5	Less than Fully Charged	White

If the laptop is running on a battery, the power or battery light operates as follows:

Table 3: Battery and power LED status if the AC adapter is not connected on current Latitude laptops.
System Power State	Battery Charge Level	LED Behavior
S0 - S5	11% to Fully Charged	Off
S0 - S5	Less than 10%	Solid Amber

Table 4: Power states in current Latitude laptops
System Power State	Description
S0 (On)	The laptop is powered on
S4 (Hibernate)	The laptop is almost turned off, context data is written to the hard drive.
S5 (Off)	The laptop is powered down/off.

Note: Learn How to Troubleshoot Dell Laptop Battery Issues. Also, learn How to Run a Preboot Diagnostic Test on a Dell Computer to identify potential hardware failure. For more information about battery warranty support, see article Dell Laptop Battery Warranty Support.

Diagnostic LEDs on Latitude Laptops (2023 to present models)

The battery charge LED is located on the side of the laptop (as shown in the section below).

Note: Laptops with an integrated fingerprint reader on the power button do not contain a power button LED.

Table 5: Power button and battery charge light
LED Light Description
1	Battery Charge status light

Diagnostic LEDs on Latitude Laptops (2023 to present models)

NOTE: These laptops rely on the battery charge LED blinking an amber or white pattern to determine failures listed in the following table:

Note:

The blinking patterns consist of two sets of numbers that represent: (First Group: Amber blinks, Second Group: White blinks).

First Group: The LED blinks 1 to nine times followed by a brief pause with LED off at the interval of 1.5 seconds in amber color.
Second Group: The LED blinks 1 to nine times followed by a longer pause before the next cycle starts again at the interval of 1.5 seconds in white color.

For example: A No Memory error is detected (2,3). The battery charge LED blinks two times in amber color followed by a pause, and then blinks three times in white color. The power LED will pause for 3 seconds before the next cycle repeats itself again.

The following table provides information about the amber and white blinking patterns with possible troubleshooting steps:

Table 6: LED flash sequences and their corresponding fault descriptions for Latitude laptops
LED Flash Sequence	Fault Description	Faults
1,1	TPM Detection Failure	Motherboard Error
1,2	SPI Flash Failure	Motherboard Error
1,5	EC unable to program i-Fuse	Motherboard Error
1,6	EC Code flow errors	Power Issue
2,1	CPU	Possible CPU Failure
2,2	Motherboard BIOS	Motherboard, Covers BIOS Corruption, or ROM Error
2,3	Memory	No memory/RAM detected
2,4	Memory	Memory/RAM failure
2,5	Memory	Invalid Memory Installed
2,6	Motherboard Chipset	Motherboard/Chipset Error
2,7	LCD	LCD Failure
2,8	LCD	LCD Power Rail Failure
3,1	RTC Power Failure	CMOS Battery Failure
3,2	PCI/Video	PCI or Video Card/Chip Failure
3,3	BIOS Recovery 1	Recovery Image Not Found
3,4	BIOS Recovery 2	Recovery Image Found But Invalid
3,5	Power Rail Failure	EC ran into power sequencing failure.
3,6	SBIOS Flash Corruption	Flash corruption detected by SBIOS
3,7	ME Error	Timeout waiting on ME to reply to HECI

Note: If the code is different than those listed above, contact Dell technical support. Alternatively you can learn more on the following article: How to Run a Preboot Diagnostic Test on a Dell Computer To help identify potential hardware failures.

Diagnostic LED's on Latitude Laptops (2017 to 2023 models)

These laptops rely on the battery charge LED blinking an amber or white pattern to determine failures listed in the following table:

Note:

The blinking patterns consist of two sets of numbers that represent: (First Group: Amber blinks, Second Group: White blinks).

First Group: The LED blinks 1 to nine times followed by a brief pause with LED off at the interval of 1.5 seconds in amber color.
Second Group: The LED blinks 1 to nine times followed by a longer pause before the next cycle starts again at the interval of 1.5 seconds in white color.

The following table provides information about the amber and white blinking patterns with possible troubleshooting steps:

Table 7: LED flash sequences and their corresponding fault descriptions for Latitude laptops
LED Flash Sequence	Fault Description	Faults
2,1	CPU	Possible CPU Failure
2,2	Motherboard BIOS	Motherboard, Covers BIOS Corruption, or ROM Error
2,3	Memory	No memory/RAM detected
2,4	Memory	Memory/RAM failure
2,5	Memory	Invalid Memory Installed
2,6	Motherboard Chipset	Motherboard/Chipset Error
2,7	LCD	LCD Failure
2,8	LCD	LCD Power Rail Failure
3,1	RTC Power Failure	CMOS Battery Failure
3,2	PCI/Video	PCI or Video Card/Chip Failure
3,3	BIOS Recovery 1	Recovery Image Not Found
3,4	BIOS Recovery 2	Recovery Image Found But Invalid
3,5	Power Rail Failure	EC ran into power sequencing failure.
3,6	SBIOS Flash Corruption	Flash corruption detected by SBIOS
3,7	ME Error	Timeout waiting on ME to reply to HECI

Diagnostic LED's on Latitude Laptops (2015 to 2017 models)

The power button LED is located near the top right-side of the laptop as shown below:

Diagnostic LEDs on Latitude Laptops (2015 to 2017 models)

These laptops rely on the power button LED blinking an amber or white pattern to determine failures listed in the following table:

Note:

The blinking patterns consist of two sets of numbers represented by (First Group: Amber blinks, Second Group: White blinks).

First Group: The LED blinks 1 to nine times followed by a brief pause with LED off at the interval of 1.5 seconds in amber color.
Second Group: The LED blinks 1 to nine times followed by a longer pause before the next cycle starts again at the interval of 1.5 seconds in white color.

For example: A No Memory error is detected (2,3). The power button LED blinks two times of amber color followed by a pause, and then blinks three times of white color. The power LED will pause for 3 seconds before the next cycle repeats itself again.

The following table depicts the amber and white blinking patterns with possible troubleshooting steps:

Table 8: LED flash sequences and their corresponding fault descriptions for Latitude laptops (2015 to 2017 models)
LED Flash Sequence	Fault Description	Faults
2,1	CPU	Possible CPU Failure
2,2	Motherboard BIOS	Motherboard, Covers BIOS Corruption, or ROM Error
2,3	Memory	No memory/RAM detected
2,4	Memory	Memory/RAM failure
2,5	Memory	Invalid Memory Installed
2,6	Motherboard Chipset	Motherboard/Chipset Error
2,7	LCD	LCD Failure
3,1	RTC Power Failure	CMOS Battery Failure
3,2	PCI/Video	PCI or Video Card/Chip Failure
3,3	BIOS Recovery 1	Recovery Image Not Found
3,4	BIOS Recovery 2	Recovery Image Found But Invalid

Note: If the code is different than those listed above, contact Dell technical support. Alternatively you can learn more from the following article: How to Run a Preboot Diagnostic Test on a Dell Computer. To help identify potential hardware failures.

Note: Learn How to Troubleshoot Dell Laptop Battery Issues.

Latitude E-series Battery Light Status

Battery light status on Latitude E-series laptops

The power or battery LED light turns white or amber to indicate the power status and remaining battery charge. See the tables below.

Table 9: Status of LED lights on Latitude E-series laptops.
LED Light Description
1	Power Light
2	Hard drive light
3	Battery status light
4	WiFi light

Battery LED light status

Table 10: Battery LED light status on Latitude E-series laptops
Battery State	LED Behavior	Next Steps
An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop.	Alternately blinking amber light and white light	Try reseating the AC adapter or try a 'known good' adapter - if the fault persists, consider replacing the AC adapter.
Temporary battery failure with AC adapter present	Alternately blinking amber light with steady white light	Try reseating the battery. If the issue persists, try swapping the battery with another laptop. If the issue persists, the battery may require replacement. For more information about battery warranty, see our Dell Laptop Battery Warranty Support.
Fatal battery failure with AC adapter present	Constantly blinking amber light	Try two-way swapping the battery with a 'known good' one and see if the fault follows the battery. If the issue persists, the battery may require replacement. For more info on battery warranty, see our Dell Laptop Battery Warranty Support.
Battery in full charge mode with AC adapter present	Light off.	No further action required
Battery in charge mode with AC adapter present	White light on	No further action required

Note: Learn How to Troubleshoot Dell Laptop Battery Issues for battery or battery changing issues.

If the laptop is connected to an electrical outlet, the power or battery light operates as follows:

Table 11: Power and battery light status if the Latitude E-series laptop is connected to AC adapter.
Power State	Charging status	LED Behavior
On	Any (0-100%)	Solid white
Standby	Any (0-100%)	Breathe white (slow increase/decrease in illumination).
Off, hibernate.	>90% charge	Off
Off, hibernate.	= 90% charge	Solid white

If the laptop is running on a battery, the power or battery light operates as follows:

Table 12: Power and battery LED light status if the Latitude E-series laptop is not connected to AC adapter.
Power State	Remaining battery power	LED Behavior
On	= 10% charge	Solid white
On	10% charge	Solid amber
Standby	= 10% charge	Breathe white (slow increase/decrease in illumination).
Standby	10% charge	Solid amber
Off, hibernate.	Any (0-100%)	Off

Note: Learn How to Check Battery Health Status on Dell Laptops. Also, learn How to Run a Preboot Diagnostic Test on a Dell Computer to identify potential hardware failure. For more information about battery warranty, see article Dell Laptop Battery Warranty Support.

Diagnostic LEDs on Latitude Laptops (2008 to 2015 models)

The three LED indicator lights are located near the front, right-side of the laptop as shown in the image below.

Diagnostic LEDs on Latitude laptops (2008 to 2015 models)

These laptops rely on the battery LED light blinking in an amber or white pattern to determine failures listed in the following table:

Note:

The blinking patterns consist of two sets of numbers that represent: (First Group: Amber blinks, Second Group: White blinks).

First Group: The LED blinks 1 to nine times followed by a brief pause with the LED off at the interval of 1.5 seconds in amber color.
Second Group: The LED blinks 1 to nine times followed by a longer pause before the next cycle starts again at the interval of 1.5 seconds in white color.

For example, No Memory detected (2,3), Battery LED blinks two times of amber color followed by a pause, and then blinks three times of white color. The Battery LED will pause for 3 seconds before the next cycle repeat itself again.

The following table depicts the amber and white blinking patterns with possible troubleshooting steps.

Table 13: LED flash sequence and their corresponding fault description for Latitude laptops (2008 to 2015 models)
LED Flash Sequence	Fault Description	Faults
2,1	CPU	Possible CPU Failure
2,2	Motherboard BIOS	Motherboard, Covers BIOS Corruption, or ROM Error
2,3	Memory	No memory/RAM detected
2,4	Memory	Memory/RAM failure
2,5	Memory	Invalid Memory Installed
2,6	Motherboard Chipset	Motherboard/Chipset Error
2,7	LCD	LCD Failure
3,1	RTC Power Failure	CMOS Battery Failure
3,2	PCI/Video	PCI or Video Card/Chip Failure
3,3	BIOS Recovery 1	Recovery Image Not Found
3,4	BIOS Recovery 2	Recovery Image Found But Invalid
3,5	Power Rail Failure	EC ran into power sequencing failure.
3,6	SBIOS Flash Corruption	Flash corruption detected by SBIOS
3,7	ME Error	Timeout waiting on ME to reply to HECI message

Note: If the code is different than those listed above, contact Dell technical support or learn How to Run a Preboot Diagnostic Test on a Dell Computer.

Diagnostic indicators on earlier models

Table 14: System LED status on earlier models of Latitude laptops
LED Light Description
1	Power Light
2	Hard drive light
3	Battery status light
4	WiFi light

Here is how to read the laptop LED codes when a possible error occurs.

Table 15: System LED status, their corresponding fault description, and next steps for earlier models of Latitude laptops
Storage LED	Battery LED	Wireless LED	Fault Description	Next Steps
Blinking	Solid	Solid	A possible processor failure has occurred.	Contact Dell Support
Solid	Blinking	Solid	The memory modules are detected but has encountered an error.	Troubleshoot Memory
Blinking	Blinking	Blinking	A system board failure has occurred.	Contact Dell Support
Blinking	Blinking	Solid	A possible graphics card/video failure has occurred.	Troubleshoot Video
Blinking	Blinking	Off	System failed on hard drive initialization OR System failed in Option ROM initialization.	Troubleshoot Hard Drive
Blinking	Off	Blinking	The USB controller encountered a problem during initialization.	Check ports for damage and remove any USB devices. Troubleshoot Ports
Solid	Blinking	Blinking	No memory modules are installed/detected.	Troubleshoot Memory
Blinking	Solid	Blinking	The LCD encountered a problem during initialization.	Troubleshoot Video
Off	Blinking	Blinking	The modem is preventing the laptop from completing POST.	Try reseating or removing any Modem cards.
Off	Blinking	Off	Memory failed to initialize, or memory is unsupported.	Troubleshoot Memory

Note: Learn How to Troubleshoot Dell Laptop Battery Issues. Also, learn How to Run a Preboot Diagnostic Test on a Dell Computer to identify potential hardware failure.

Battery LED Light Status on Latitude D-series Laptops

Battery Light Status

If the computer is connected to an electrical outlet, the battery light operates as follows:

Solid Green — The battery is charging.
Flashing Green — The battery is almost fully charged.

If the computer is running on a battery, the battery light operates as follows:

Off — The battery is adequately charged (or the computer is turned off)
Flashing orange — The battery charge is low.
Solid orange — The battery charge is critically low.

Note: Learn How to Troubleshoot Dell Laptop Battery Issues. Also, learn How to Run a Preboot Diagnostic Test on a Dell Computer to identify potential hardware failure.

For more information about battery warranty, see our Dell Laptop Battery Warranty Support.

Diagnostic LEDs on Latitude D-series Laptops (models prior to 2008)

LED Error Codes

The following table shows the possible LED codes that may display in a no-POST situation.

Table 16: LED codes, their corresponding fault description, and next steps for Latitude D-series laptops (models prior to 2008)
Flash Code	Description	Next Step
	The microcontroller is handing control of the laptop to the processor. This code persists if no processor is detected.	1. Reseat the processor. 2. Replace the system board. 3. Replace the processor.
	The memory has encountered an error.	1. Reseat the memory modules. 2. Replace the memory modules. 3. Replace the system board.
	A system board component is faulty.	Replace the system board.
	The video card is preventing the laptop from completing POST.	1. Replace the video card. 2. Replace the system board.
	The keyboard is preventing the laptop from completing POST.	1. Reseat the keyboard cable. 2. Replace the keyboard. 3. Replace the system board.
	The USB controller encountered a problem during initialization.	1. Remove any USB devices. 2. Replace the system board.
	No SODIMMs are installed.	1. Install the memory modules. 2. Reseat the memory modules. 3. Replace the memory modules. 4. Replace the system board.
	The LCD encountered a problem during initialization.	1. Reseat the LCD cable. 2. Replace the LCD panel. 3. Replace the video card.
	The modem is preventing the laptop from completing POST.	1. Reseat the modem. 2. Replace the modem. 3. Replace the system board.

Latitude Tablets Beep Codes and LED Error Codes

Latitude Tablet Beep Codes

The computer may emit a series of beeps during start-up if the display cannot show errors or problems. These series of beeps, called beep codes, identify various problems.

Table 17: Beeps codes and their corresponding fault description for Latitude tablets
Beep Code (repetitive short beeps)	Fault Description	Suggested Remedy
1	BIOS ROM checksum in progress or failure	System board failure, covers BIOS corruption, or ROM error.
2	Memory	No memory/RAM detected
3	Chipset Error (North and South bridge error, DMA/IMR/Timer error) Time-Of-Day Clock test failure Gate A20 failure Super I/O chip failure Test failure of the keyboard controller	System board failure
4	RAM Read/Write failure	Memory/RAM failure
5	Real-time clock power fails	Reseat the CMOS battery connection. If the problem persists, possible CMOS battery failure or system board failure
6	Video BIOS Test Failure	Video card/chip failure
7	CPU-cache test failure	Processor failure
8	LCD	LCD failure

Latitude Tablet LED Error Codes

Diagnostic LED code communicated using the Power Button LED or agreed upon alternate LED. The Power Button LED shall blink the corresponding LED codes for the corresponding fault condition.

Note: For example, No Memory detected, the power button LED blinks two times followed by a pause, blinks two times, pause, and so on. This pattern continues until the laptop is turned off.

Table 18: LED codes and their corresponding fault description for Latitude tablets
LED Code	Fault Description	Suggested Remedy
1	System Board: BIOS ROM failure	System board, covers BIOS corruption or ROM error.
2	Memory	No memory/RAM detected
3	System board failure Chipset Error Clock failure Gate A20 failure Super I/O failure Keyboard controller failure	System board failure
4	Memory	Memory/RAM failure
5	Real-time clock failure	Reseat the CMOS battery connection. If the problem persists, possible battery failure or system board failure
6	Video BIOS	Video card/chip failure
7	CPU	Processor failure
8	LCD	LCD failure

What to do next? - If the status lights described in this article indicates possible failure of the battery, learn How to Troubleshoot Dell Laptop Battery Issues.

If the error code is different than those listed in this article, contact Dell Technical Support.

A Reference Guide for Latitude Laptop and Tablet Diagnostic Indicators