# Source: led_blink_warnings.adoc

*Note: This file could not be automatically converted from AsciiDoc.*

== LED warning flash codes

If a Raspberry Pi fails to boot for some reason, or has to shut down, in many cases an LED will flash a specific number of times to indicate what happened. The LED will blink for a number of long flashes (0 or more), then produce short flashes, to indicate the exact status. In most cases, the pattern will repeat after a two-second gap.

[cols="^,^,"]
|===
| Long flashes | Short flashes | Status

| 0
| 3
| Generic failure to boot

| 0
| 4
| start*.elf not found

| 0
| 7
| Kernel image not found

| 0
| 8
| SDRAM failure

| 0
| 9
| Insufficient SDRAM

| 0
| 10
| In HALT state

| 1
| 2
| SD card overcurrent detected

| 2
| 1
| Partition not FAT

| 2
| 2
| Failed to read from partition

| 2
| 3
| Extended partition not FAT

| 2
| 4
| File signature/hash mismatch - Pi 4 and Pi 5

| 3
| 1
| SPI EEPROM error - Pi 4 and Pi 5

| 3
| 2
| SPI EEPROM is write protected - Pi 4 and Pi 5

| 3
| 3
| I2C error - Pi 4 and Pi 5

| 3
| 4
| Secure-boot configuration is not valid

| 4
| 3
| RP1 not found

| 4
| 4
| Unsupported board type

| 4
| 5
| Fatal firmware error

| 4
| 6
| Power failure type A

| 4
| 7
| Power failure type B
|===