For anyone with the same board revision (IK316Q-EMCP_V4.1) and LPDDR3 memory who is struggling to boot standard images:
I tried multiple generic builds (Ophub, etc.) and DTB edits without success. The solution was using this specific pre-configured image version from the sicXnull repository.
The working image is: Armbian-unofficial_24.11.0-trunk_X96q_bookworm_current_6.6.44_mate_desktop.img.xz
Download Link: https://github.com/sicXnull/armbian-build/releases/download/v24.8.0-trunk.425/Armbian-unofficial_24.11.0-trunk_X96q_bookworm_current_6.6.44_mate_desktop.img.xz
It booted immediately. Hope this helps others with this specific hardware.
gabriel_altoe got a reaction from sicxnull in [Help] No Boot on Allwinner H313 TV Box (Board IK316Q-EMCP_V4.1) - LPDDR3