Created an application in balenaCloud, downloaded for Ras Pi 3. Wrote to micrtoSD using Etcher. Want the OS to run on a 3 B+, but it simply does nothing. Green ACK lite generally remains solid (goes out once in a while, but comes back), no lights at all on Ethernet port. SD card slot seems to get very warm. Same image works fine on a Pi 3B, just not the 3B+. Rasbian runs fine on the 3B+ in question using the same microSD. Any ideas?