if a system is stuck in a boot loop (continuous post number count) the normal method is a fresh flash via USB, if the system can be reached via network it can also be flashed via a command line, both will clear all data & perform a fresh install of firmware, recovery after the system is functioning again can be performed or continue with a clean install/image. Often the cause of a boot-loop is due to 3rd party plugins having issues or the system having outdated software. The best way to cure any Enigma2 issues is a fresh install of firmware via USB.