My eMMC boot issue

Hi,

I got my RockPI4A yesterday, sorry for the noob question.

I can boot debian from SD card without issue but it will not boot from eMMC.

I have flashed the MMC with dd=

If i run ‘sudo parted -l’, I am shown an error ‘‘Warning: Error fsyncing/closing /dev/mmcblk1rpmb: Input/output error’’

I’m not sure what that mmcblk1rpmb partition is, I flashed with the same image as the SD card but there is no ‘‘mmcblk0rpmb’’

If I remove the SD and power on, the screen remains black and the blue led remains on 100% of the time.

Spi is installed on mdt0, should I erase this? Will it then boot from the eMMC or will this brick the device?

Any advice would be welcome. I’ll keep looking