LiveDash is a separate firmware to AURA I think, have you tried flashing with an older firmware for it? I think its done from within Windows.

I haven't peeked under the IO shield myself yet but it must connect to the motherboard somehow, perhaps check the physical connection is OK/look for any burned out components or bridged solder points on the OLED's board, if it's easily accessible.

I haven't used AURA yet so can't help there apart from basic troubleshooting - is Windows a fresh install for this motherboard - what version of Windows are you running - is it up to date (creators update)? Try a fresh install if you can, download it direct from Microsoft and create a fresh USB installer, if you haven't already, I've found upgrading windows to the Creators Update version leaves it in a bit of a state, but fresh installs are fine.