The following table shows different light patterns and what they indicate:
Table 20. Diagnostic LED behavior
Blinking pattern
Problem description Suggested resolution
Amber White
1 1 MBIST: TPM Detection Failure Replace the system board.
1 2 MBIST:SPI flash, Unrecoverable SPI flash
failure
Replace the system board.
1 5 i-Fuse: Failure EC unable to program i-Fuse Replace the system board.
1 6 EC internal: Failure Generic catch-all for
ungraceful EC code flow errors
Disconnect all power source (AC,
battery, coin-cell) and press and hold
the power button to drain flea power.
2 1 Processor failure Run the Intel CPU diagnostics tools. If
problem continues, replace the system
board.
2 2 System board: BIOS or ROM (Read-Only
Memory) failure
Flash the latest BIOS version. If problem
continues, replace the system board.
2 3 No memory or RAM (Random-Access
Memory) detected
Check and confirm that the memory
module is installed properly. If problem
continues, replace the memory module.
2 4 Memory or RAM (Random-Access Memory)
failure
Reset the memory module. If problem
continues, replace the memory module.
2 5 Invalid memory installed Reset the memory module. If problem
continues, replace the memory module.
2 6 System-board or chipset error Flash the latest BIOS version. If problem
continues, replace the system board.
2 7 Display failure Flash the latest BIOS version. If problem
continues, replace the LCD module.
2 8 LCD power rail failure Replace the system board.
3 1 CMOS battery failure Reset the CMOS battery connection.
If problem continues, replace the RTS
battery.
3 2 PCI, video card/chip failure Replace the system board.
3 3 Recovery image not found Flash the latest BIOS version. If problem
continues, replace the system board.
3 4 Recovery image found but invalid Flash the latest BIOS version. If problem
continues, replace the system board.
3 5 Power-rail failure EC ran into power sequencing failure. If
problem continues, replace the system
board.
3 6 System BIOS Flash incomplete Flash corruption detected by BIOS. If
problem continues, replace the system
board.
3 7 Management Engine (ME) error Timeout error displayed while waiting on
ME to reply to HECI message. If problem
continues, replace the system board.
4 1 Memory DIMM power rail failure Replace the system board.
4 2 CPU power cable connection issue Initiate PSU BIST. If problem persists,
replace the system board.
60 Troubleshooting
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