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Chemistry LibreTexts

5: LEDs

  • Page ID
    432678
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    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
    clipboard_e75da27824123f2d67379623b54078e45.pngFigure \(\PageIndex{1}\): 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

     


    This page titled 5: LEDs is shared under a not declared license and was authored, remixed, and/or curated by Robert Belford.

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