Laptop power supply stops buzzing when plugged in,laptop is dead wont charge or turn on

[mark owens11]

Hi all I have a HP G2 455 laptop,the power supply slightly buzzes when its NOT connected to the laptop,when I connect it,it goes quiet but I cant charge or switch the machine on.Any ideas please? Laptop or the psu, which is it? Theres no lights indicating power is getting to the laptop either Thanks

 

[okcnaline]

That's normal; voltage not going to the laptop is stuck in the power brick, vibrating the coil.