Does not turn on LED stand by, sharp intermittent sound which I suspect comes from the fly back not being sure ...

companion. 1.- Remove the flyack and the hot, connect a focus of the b + to ground, check and comment how much you have of b + .- 2.- Connect your frequency meter at the base of the hot and check the frequency, 15750 cycles. options to measure the flyback: 1 ing orozco meter, 2.- bob parker meter, 3 with a vpp probe.- if you like, you can send diagram and details of how to use the vpp probe. to test the flyback in the circuit. - regards. Felipe ascencio