Many thanks jack9 but I seem to have the exact same problem with those builds too. They install, then reboot, m8 splash, libreELEC splash then nothing. I can install the m8 6.0.0 build from that site but then as soon as I try a later one LIbreELEC, be it v7.x or 8.x I get the blank screen again, back to openelec and all is fine. The strange thing is I can update Demetris 8.0RC4 without any issue and also Demetris LibreELEC-S802.arm-8.0.1a-M8 (which has now been removed?). So I'm not sure what is different with those builds.
Any ideas? Demetris can you shed any light or have anything I can check / test?
Many thanks in advance
Your situation is identical to mine, we probably have the exact same M8.
I posted after every subsequent Demetris build just to say that it wasn't working in the hope that I would get some assistance but none has been forthcoming. I hope you have better luck so we can both benefit.