i got a rocketfish RF-900WPS from a friend. i installed it in my system to find my computer is not posting and the psu is making a squeeling sound. any ideas on this and how to fix. if you need anymore answers plaease ask i paid only 25 for this and an alienware case either way i made out with this deal but really needed this psu. I have checked all the voltages too they all seem in order and did have everything pluged in.