rpi-eeprom/imager

Raspberry Pi 4 EEPROM bootloader rescue image
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The Raspberry Pi 4 contains a small EEPROM used to store the bootloader.

This rescue image reverts the bootloader EEPROM to factory default settings.

This rescue image also updates the USB 3.0 (VL805) firmware to the latest
version (138a1) with better full-speed isochronous endpoint support.

The easiest method for creating EEPROM rescue images, and formatting SD cards,
is to use Raspberry Pi Imager from https://raspberrypi.com/software.
Imager provides a GUI for downloading the latest version of this rescue
image and flashing it to an SD card.

Alternatively, copy the contents of this zip file to a blank
FAT formatted SD card. The FAT partition must be < 32 GB.

To update the EEPROM:

1. Power off the Raspberry Pi
2. Insert an SD card containing the files from this zip file
3. Power on the Raspberry Pi
4. Wait at least 10 seconds

If successful, the green LED light on the Raspberry Pi will blink rapidly forever.
An unsuccessful update of the EEPROM is indicated by an alternate blinking pattern
corresponding to the specific error.

If an HDMI display is attached, then the screen will display green for success
or red if a failure occurs.

Once the EEPROM is updated, the SD card can be removed.