Rock pi 4b plus v1.73 won't boot emmc

#1

Rock Pi 4B+ v1.73

Followed this guide https://wiki.radxa.com/Rockpi4/install/eMMC

Was able to boot from uSD with both Ubuntu server 20.04 & Debian. Tried to dd to the emmc -> unplug -> remove uSD. Plug back in. Board shows solid green light. No blue light flashing. Screen does not show up. Does not boot from the emmc. Don’t know how to tell if this board has SPI and that is causing the issue or not. I have not tried connecting pin 23 & 25. I tried to connect the USB TTL serial cable to see logs but it is not working correctly either.

Any help would be greatly appreciated.

Also, when I plug the uSD back in it no longer shows the screen. See blue light flashing but no picture. Have to reflash the uSD then it works again.

Edit: Checked the purchase, looks like the board should have SPI flash (https://shop.allnetchina.cn/collections/frontpage/products/rock-pi-4-model-b-board-only-2-4-5ghz-wlan-bluetooth-5-0?variant=39284740685926). I guess i’ll have to wait for the connectors to show up to disable pin 23 & 25

#2

Solved my own problem. Feel so dumb. :smile: For anyone in the future, the eMMC was mapped to a different /dev/ path than the wiki I followed. fdisk was located under /sbin and not on the PATH.

To find your emmc do /sbin/fdisk -l
Should be close to the size you purchased. Then change you dd command to write (of) to the correct dev path. For me, it was /dev/mmcblk2

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#3

I was going crazy. I have used Rock 3A so far, this is the first Rock 4B + I install, and I confirm:

sudo dd if = rockpi-4b-debian-buster-xfce4-arm64-20220801-0347-gpt.img of = / dev / mmcblk2 bs = 1M

Thanks snack bar

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