On October 23, 2018 at 19:24, Impaqt said...
You really should check if it works without the hard drive plugged in. I've had the same issue on 2 MMS3e's. Pulled the seagate USB drive off, and it went away. theres some polling of the hard drive in the new firmware that doesnt play nice with some drives.
THIS kind of off-the-wall bizarro problem makes a whole lot more sense than magically appearing EMI or ground problems.