you may have killed it.


try 1 stick at freq 100 directly to the pi


see if it runs.


4 sticks on that hub is a lot of juice.


can you read the brick specs.

1  stick will pull 10 watts at  freq 200


so if the brick reads 5v volts and 14 amps

 it should be okay,

but if the brick reads 5 amps and 12 volts   

some math 5 x 12 = 60  convert to 5v   means 60 x .85 =  51 watts   that is 12 to 5 volt


 so 4 sticks at freq  200  = 10 watts x 4 = 40 watts



so you have a 51 watts brick maybe ?  well    seems good    24/7/365 means derate by 80%  so 51 x 80% = 40.8 watts

so four sticks at freq 200  is pushing the brick hard  as 40.8 is close to 40

and freq 250 would be over use of power.

I believe you killed off the brick..