@PMCG1 UPDATE: So, I found the right file version, so I have upgraded (I think) the unit to 1.8.2, so all units on the same version. After a power cycle, the faulty unit stays solid yellow/green for...

Hi, Been all over trying to resolve this - the last firmware upgrade bricked one of my three M4s. The unit is stuck on a solid yellow - although it appears to suggest that's not possible on an M4,...