9.7: LEDs
- Page ID
- 470294
\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \)
\( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)
\( \newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\)
( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\)
\( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\)
\( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\)
\( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\)
\( \newcommand{\Span}{\mathrm{span}}\)
\( \newcommand{\id}{\mathrm{id}}\)
\( \newcommand{\Span}{\mathrm{span}}\)
\( \newcommand{\kernel}{\mathrm{null}\,}\)
\( \newcommand{\range}{\mathrm{range}\,}\)
\( \newcommand{\RealPart}{\mathrm{Re}}\)
\( \newcommand{\ImaginaryPart}{\mathrm{Im}}\)
\( \newcommand{\Argument}{\mathrm{Arg}}\)
\( \newcommand{\norm}[1]{\| #1 \|}\)
\( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\)
\( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\AA}{\unicode[.8,0]{x212B}}\)
\( \newcommand{\vectorA}[1]{\vec{#1}} % arrow\)
\( \newcommand{\vectorAt}[1]{\vec{\text{#1}}} % arrow\)
\( \newcommand{\vectorB}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \)
\( \newcommand{\vectorC}[1]{\textbf{#1}} \)
\( \newcommand{\vectorD}[1]{\overrightarrow{#1}} \)
\( \newcommand{\vectorDt}[1]{\overrightarrow{\text{#1}}} \)
\( \newcommand{\vectE}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{\mathbf {#1}}}} \)
\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \)
\( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)
There are two LED status lights on the Raspberry Pi.
- Red LED - Power On
- Flicker indiates power problem
- Green LED - SD Card Activity
- Flashes during read/write operations
- Patterns vary by Pi Model
Figure \(\PageIndex{1}\): LED Status Lights on a RasPi 4. (Belford cc 0.0)LED Warning Flash Codes
source: RasPi Documentation
| 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 |
|
3 |
1 |
SPI EEPROM error - Pi 4 |
|
3 |
2 |
SPI EEPROM is write protected - Pi 4 |
|
3 |
3 |
I2C error - Pi 4 |
|
3 |
4 |
Secure-boot configuration is not valid |
|
4 |
4 |
Unsupported board type |
|
4 |
5 |
Fatal firmware error |
|
4 |
6 |
Power failure type A |
|
4 |
7 |
Power failure type B |