GL-AR750S - snapping off by itself

Hi GLI, something going wrong with slate. it is going off by itself. I traveled and came back last night. when i turn the router on, the green light shows power on then nothing happens for hours, i unplugged and replugged, it turn on, work for few 10s of minutes then went off, on and off on and off till this morning when it goes of again…what’s the solution? my power source is 5v/2a samsung galaxy note plug

Seem it was bricked. You can refer to Debrick via Uboot - GL.iNet Docs to debrick it.