Dell Precision 7920 Tower Owner's Manual

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Preboot blinking power button codes

Table 1. Power button LED state The following table lists the different diagnostics power button LED state:
Power Button LED State	Description
Off	Power is Off. LED is blank.
Blinking Amber	Initial State of LED at power up. See the table below for Blinking Amber pattern diagnostic suggestions and possible failures.
Blinking White	System is in a low power state, either S1 or S3. This does not indicate a fault condition.
Solid Amber	The second state of the LED at power up, indicates that the POWER_GOOD signal is active and it is probable that the power supply is fine.
Solid White	System is in S0 state. This is the normal power states of a functioning machine. The BIOS will turn the LED to this states to indicate it has started fetching op-codes.

Table 2. Diagnostic LED behaviorThe following table provides the diagnostically led behavior:
Blinking pattern		Problem description	Suggested resolution
Amber	White	Problem description	Suggested resolution
1	1	Faulty System board	To troubleshoot the issue with system board, contact Tech support.
1	2	Bad Power_Ctrl Cable, System Board or, PSU	Make sure Power_Ctrl Cable is connected. Remove PSU and test BIST button outside of the system first, if failed, replace PSU. If not, install back the PSU and test the BIST button again. If nothing works, contact Tech Support for system board replacement
1	3	Bad system board, Memory or Processor	If you can assist to troubleshoot, narrow down the issue by reseating memory and swapping a known good memory if available. If nothing works, contact Tech Support
2	1	Bad Processor	CPU configuration activity is in progress or a CPU failure was detected. Contact Tech Support If you can assist to troubleshoot, narrow down the issue by ensuring CPU 0 is installed, CPU0 and CPU1 is an identical matching pair and swapping a known good CPU if available. If nothing works, contact Tech Support
2	2	Motherboard: BIOS ROM failure	System is in Recovery Mode. Flash latest BIOS version. If problem persists, contact Tech Support
2	3	No Memory	If customer can assist to troubleshoot, narrow down the issue by removing the memory module one by one to determine which one failed and swapping to a known good memory if available to confirm. Contact Tech Support
2	4	Memory/RAM failure	If customer can assist to troubleshoot, narrow down the issue by removing the memory module one by one to determine which one failed and swapping to a known good memory if available to confirm. Contact Tech Support
2	5	Invalid memory installed	Memory subsystem configuration activity is in progress. Memory modules have been detected but appear to be incompatible or in an invalid configuration. If customer can assist to troubleshoot, narrow down the issue by removing one by one the memory on motherboard to determine which one failed. Contact Tech Support.
2	6	Motherboard: Chipset	Fatal system board failure detected. If customer can assist to troubleshoot, narrow down the issue by removing one by one the component on motherboard to determine which one failed. If you identified any of the components failed, replace the Component. Contact Tech Support.
3	2	PCI Device or Video	PCI device configuration activity is in progress or PCI device failure was detected. If you can assist to troubleshoot, narrow down the issue by reseating PCI card and removing one by one to determine which card failed. Contact Tech Support.
3	3	BIOS Recovery 1	System is in Recovery Mode. Flash latest BIOS version. If problem persists, contact Tech Support
3	4	BIOS Recovery 2	System is in Recovery Mode. Flash latest BIOS version. If problem persists, contact Tech Support
4	4	Riser board issue	Power issue on Riser second CPU board
4	5	PCIe Add-in Card population issue	PCI device is installed on CPU1 slot and CPU1 is not installed. If you can assist to troubleshoot, move all PCIe card in CPU1 slot to CPU0 slot. An alternative would be install an identical CPU as CPU0 to CPU1 socket. Contact Tech Support
4	6	RAID Volume degraded	RAID volume is degraded. If you can assist to troubleshoot, us F12 menu to enter Device Configuration tab. Rebuild the RAID volume if possible Contact Tech Support.
4	7	System Side cover is missing	System side cover(either left or right) is missing. Unplug power, Install back all side covers back to the chassis and plug in power. Contact Tech Support.