ceiling rose in my living room has blown,reset board light does not work ,bought replacement still does not work,so transposed known working switch & they work.have 3 connections in the ceiling rose,1has 2 neutrals the other has 3 lives & the other one is a black live there is live going into the conector by the 3 reds & also black livewhen i put an electric screw driver to the black live & switch the lite switch on the live is no longer there,can anyone help please