Precision 5860 Tower Service Manual

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System-diagnostic lights

This section lists the system-diagnostic lights of your computer.

Power-supply diagnostics light

Indicates the status of the power-supply in either of the two sates:

Off: No Power
On: Power is supplied.

Power button light

Table 1. Power button LED statusThe following table provides the power button LED status of your computer.
Power button LED state	System state	Description
Off	S4 S5	There is in Hibernate or Off state.
Solid White	S0	Working state
Solid Amber		Various sleep states or No POST
Blinking Amber/White		Failure to POST

This platform relies on the Power button LED light blinking in an amber/white pattern to determine a failure as listed in the following table:

NOTE:

The blinking patterns consists of two numbers (representing First Group: Amber blinks, Second Group: White blinks).

First Group: The Power button LED light blinks Amber, 1 to 9 times followed by a short pause with LED off for a couple of seconds.
Second Group: The Power button LED light then blinks White, 1 to 9 times, followed by a longer pause before the next cycle starts again after a short interval.

Example: No Memory detected (2,3). Power button LED blinks 2-times in Amber followed by a pause, and then blinks 3-times in White. The Power button LED will pause for few seconds before the next cycle repeats itself again.

Table 2. System-diagnostic lightsThe following table provides the system-diagnostic lights of your computer.
Blinking pattern		Problem description	Suggested resolution
Amber	White	Problem description	Suggested resolution
1	1	TPM detection failure	Replace the system board.
1	2	Unrecoverable SPI Flash Failure	Replace the system board.
1	5	EC unable to program i-Fuse	Replace the system board.
1	6	Generic catch-all for ungraceful EC code flow errors	Disconnect all power source (AC, battery, coin cell) and drain flea power by pressing and holding down power button for 3~5 seconds.
2	1	CPU failure	Run the Dell Support Assist/Dell Diagnostics tool. If problem persists, replace the system board.
2	2	System board failure (included BIOS corruption or ROM error)	Flash latest BIOS version If problem persists, replace the system board.
2	3	No memory/RAM detected	Confirm that the memory module is installed properly. If problem persists, replace the memory module.
2	4	Memory/RAM failure	Reset and swap memory modules among the slots. If problem persists, replace the memory module.
2	5	Invalid memory installed	Reset and swap memory modules among the slots. If problem persists, replace the memory module.
2	6	System board/Chipset Error	Replace the system board.
3	1	CMOS battery failure	Reset the main battery connection. If problem persists, replace the main battery.
3	2	PCI or Video card/chip failure	Replace the system board.
3	3	BIOS Recovery image not found	Flash latest BIOS version If problem persists, replace the system board.
3	4	BIOS Recovery image found but invalid	Flash latest BIOS version If problem persists, replace the system board.
3	5	Power rail failure	Replace the system board.
3	6	Flash corruption detected by SBIOS.	Press power button for over 25 seconds to do RTC reset. If problem persists, replace the system board. Disconnect all power source (AC, battery, coin cell) and drain flea power by pressing and holding down power button 3~5 seconds to ensure all power are drained. Run "BIOS recovery from USB", and the instructions are in the website Dell support. If problem persists, replace the system board.
3	7	Timeout waiting on ME to reply to HECI message.	Replace the system board.

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Precision 5860 Tower Service Manual

System-diagnostic lights

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