Hello.
I tried to install LEDE in HG556a ver. C device, but it stuck in boot. I flashed https://downloads.lede-project.org/snapshots/targets/brcm63xx/generic/lede-brcm63xx-generic-HG556a-C-squashfs-cfe.bin from 04/07/2017 with sha256: 99d8dae6a9ac7de5fb34df9ad55749af1ca8f03be9d8e1f426d0f413c254e6b0
Stable realeases also have the same problem. I was able to extract the bootlog:
Salu2