How do I recover corrupted eMMC flash on Respeaker Core V2?

Products & Technology ReSpeaker
#1

I followed this guide to flash the EMMC the old way, since I don’t have a working sd-card reader on the respeaker.

Here is the settings I used and it said everything OK when it finished. When I reboot the board, I don’t get any COM port, no RockUSB device and “no device” in Androidtool. If I connect a HDMI cable it displays nothing. What can I do to make it work again? Can I short some pins to make it go into Maskrom Mode again?
Please help!

1
1892×455 12.1 KB

#2

I got an answer from Seed studios. Apparently the guide is outdated, which the guide does not say anywhere at all. So using that guide WILL CORRUPT your respeaker. Just a heads-up.
Not a very helpful company. They did not want to help out.