I have this exact problem. Was there ever a solution?
As mentioned before, I have a few different variations of the m72e, I'll have another go at installing LibreElec when I get back to work.
I dont think there is a solution at the moment, nor any explanation on why this is not working.
Thanks for your reply 
That's what I did in the first place though
Hi.
Any progress on this? I'm having the exact same issue, and it is really annoying 
I tried 3 different M72e, and LibreElec doesn't really seem to like them. Two of the ones I tried has wifi built in, which is really neat for a Kodi box.
Originally two of them were terminals, one of them sporting 8GB SSD, 4GB ram and a Celeron processor (3267-1B3), the other one 4GB ram, a mechanical disk and some Pentium CPU (4004-LPG). Both would be perfect for LibreElec JEOS for Kodi, but they just will not boot after install. Tried a third M72e Core i3, 4GB ram, SSD (3264-CR4) - same problem.
Also tried a M73, core i5, 8GB ram, SSD (10AY-S04T00), and it works perfectly. Seems like there might be something about the M72e motherboard, that the Linux distro doesn't like 
