Sorry to hear it! Can you answer these questions?
1) Do you see a flash of LEDs for a moment when you turn it on?
2) Do you see a red LED on the rear circuit board light up when you turn it on, and then begin to dimly blink after a couple seconds?
If you don’t see either of these, the problem is likely a bad AC cable (the cable that attaches the power supply to the wall). See if you can swap that first, and if there’s still a problem we’ll take it from there.