hello, I changed the power supply why led #1 did not light up, I want to clarify that... the led lit for 0.5 sec and went off... I bought a second-hand power supply here in ifixit but, the same thing happened, this source that I bought has a tick sound as if it is shorted, I wonder if it could be the motherboard that is damaging the power supply? Or did they give me a damaged power supply?