I have three Deco M5 units and they are worked fine, I have seen a new firmware available for the Deco M5 thus I try to update the firmware of the Deco M5, during the upgrade process, due to a sudden

i have 2 deco after i update to firmware 1.5.1 the other deco is stuck on solid red then if i unplug will turn to solid yellow and if i hard reset it will turn flashing green with faded blue then back