OptiPlex 7090 Tower Service Manual

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Diagnostic LED behavior

Table 1. Diagnostic LED behaviorThe following table provides the diagnostically led behavior:
Blinking pattern		Problem description	Suggested resolution
Amber	White	Problem description	Suggested resolution
1	2	Unrecoverable SPI Flash Failure
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 the memory module. If problem persists, replace the memory module.
2	5	Invalid memory installed	Reset the memory module. If problem persists, replace the memory module.
2	6	System board / Chipset Error / Clock failure / Gate A20 failure / Super I/O failure / Keyboard controller failure	Flash latest BIOS version If problem persists, replace the system board.
3	1	CMOS battery failure	Reset the CMOS battery connection. If problem persists, replace the RTS 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	EC ran into power sequencing failure. If problem persists, replace the system board.
3	6	SBIOS Flash corruption	Flash corruption detected by SBIOS If problem persists, replace the system board.
3	7	Intel ME (Management Engine) Error	Timeout waiting on ME to reply to HECI message If problem persists, replace the system board.
4	2	CPU Power Cable Connection Issue