System-diagnostic lights
Table 48. Diagnostic LED behavior
Blinking pattern
Problem descriptionAmber White
1 1 TPM Detection Failure
1 2 Unrecoverable SPI Flash Failure
1 5 EC unable to program i-Fuse
1 6 Generic catch-all for ungraceful EC code
flow errors
1 7 Non-RPMC Flash on Boot Guard fused
system
2 1 CPU failure
2 2 System board, BIOS corruption, or ROM
error
2 3 No Memory/RAM detected
2 4 Memory/RAM failure
2 5 Invalid memory installed
2 6 System board/ chipset error
2 7 LCD failure - SBIOS message
2 8 System board - EC detection of LCD
power rail failure
3 1 CMOS battery failure
3 2 PCI of Video card or chip failure
3 3 Recovery Image not found
3 4 Recovery image found but not valid
3 5 EC ran into power sequencing failure
3 6 Flash corruption detected by SBIOS
3 7 Timeout waiting on ME to reply to HECI
message
4 1 Memory DIMM power rail failure
4 2 CPU Power Cable Connection Issue
Recovering the operating system
When your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell
SupportAssist OS Recovery.
Dell SupportAssist OS Recovery is a stand-alone tool that is preinstalled in all Dell computers that are installed with the Windows
operating system. It consists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the
operating system. It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer
to its factory state.
You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their
primary operating system due to software or hardware failures.
138
Troubleshooting
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