Recovery.pdf

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Recovery

If your

Raspberry Pi 4

will not boot, it is possible that the SPI EEPROM has become

corrupted.

To check, remove the SD card, disconnect the device from power, then reconnect it.

If the green LED does not flash, you will need to reprogram the EEPROM:

Download the bootloader

SHA-

256:

444e0f68aa21d5b4e158259061de55738d36a1986e2ced14bb14d7

af1a04881c

2. Extract it to an empty FAT-formatted SD card and insert it into your Raspberry

Pi 4

3. Connect the power and wait for the green LED to flash quickly

Notes:

•

The updated bootloader improves compatibility with HATs by changing the

behaviour of HALT to keep the 3V3 pin powered (view the full

bootloader

release notes)

The previous bootloader remains

available for download