Hello. I bought a new as rock motherboard to replace my old as rock mobo. As soon as I plug my psu into the mobo I get a high pitched noise from the psu. Have not tried to turn on pc due to me being scared of frying something. When the psu is not plugged into anything (only the wall) no sound is made so I don't think the psu is broke as it was working the other day and is only a couple months old. Help!