Hi,
I''ve installed a different image 8.2.4.2 fix lost audio v2 (search this thread) without any problems on a U9H, use the correct dtb.img for this release it is provided in the download link for that version. I used rufus 3.0 to write the image to SD card.
You may also look at this thread [HOWTO] Boot from SD card, use internal memory for data
This makes kodi run much faster because the internal data partition is used for data