
Like another here my Unifi USG wouldnt boot up and just had a blinking console light. After some research on Unifi forums, it became clear the problem had to do with the unifi power adapter gone bad or not powerful enough. I bought the 12V 2 amp model of Chanzon and my USG is happy as can be again. Not sure about longevity but relieved that the solution was simple.

UL Listed AC DC Adapter With Long 8.2 Ft Cord For Brother P-Touch Label Makers - Compatible With AD-24 AD-24ES AD-20 AD-30
28 Review

24V 5A 120W ALITOVE Universal Regulated Switching Transformer Adapter AC110V To DC 24V Converter Driver For LED Strip Light CCTV Camera Security System
16 Review

12V 6A 72W AC To DC Power Supply Adapter Converter Regulator With 5.5Mm X 2.1Mm DC Plug, Wall Plug Switch For 5050 LED Strip Lights
17 Review

12V AC Adapter Power Cord Compatible With Roku 3 4230CA, 2 2720R, 1 2710R Streaming Media Player Replacement Charger
14 Review