If a Raspberry Pi doesn't start up or shuts down unexpectedly, the LED may flash in a pattern to show what went wrong. The LED blinks with a series of long flashes (sometimes none), followed by short flashes. This pattern explains the problem. Usually, the sequence repeats after a two-second pause.
| 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 |
|
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 |
