CRS226-24g-2s+ OFF

Good evening
I have four switches, CRS226-24g-2s, connected to each other:

  • 1 Problem, a CRS from yesterday is off-line, it turns on and during the start-up phase, it goes off by itself, and repeats to infinity without giving me the possibility to access the system log, version 6.43.4;


  • 2 Problem, another CRS is version 6.42, I connect with winbox.exe, I try to update it as always done, download the new version, installation phase, reboots, but the version is still the same 6.42;