I have two original tiptop power bricks, each one output 13 V, 3.07 A max. No problem since day one.
the amperage in you case seems low, what power brick are you using? although it's strange if the uZeus rail indicators blinks even with one module plugged in..
Have you tried to remove/swap all the busboards? If it blinks even without busboards connected to the header the uZeus could have an issue. Have you inspected the back of the module? alla caps are in place?