Changes

# <span class="tb_red">Update the bootloader firmware to the last verson, refer to [[How to update eeprom firmware]], this is very important!!!</span> Make sure your upgrade is successful by running command '''vcgencmd bootloader_version'''

# Add '''''PCIE_PROBE=1''''' to the eeprom, (Run '''sudo rpi-eeprom-config --edit''' command, then add this line, then press CTRL+O to write change to file, press CTRL+X to exit, then '''reboot''')

# Make sure the SSD type you use is correct, only support <span class="tb_red">M.2 NVME (Sata) Key-M SSD '''</span>NOT support''' M.2 NGFF Key-B SSD. Refer to the right diagram:

# Make sure the FPC cable is '''firmly and fully inserted''' into the PI 5, this is '''very important'''. For [[X1003]] shield, make sure the FPC cable '''direction''' is correct also.

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</ref>to troubleshoot the issue.<span>

# Although you can also boot from a SD card, Pi OS is required for the NVMe SSD to boot, DON'T forget Flash OS into NVMe SSD.

# If you're flashing a fresh Pi OS into NVME SSD , DON'T forget to '''ENABLE PCIe''' to NVME SSD.