Hey sorry im putting in this section but i dont know where this topic would go.

Ok well my northgate bridge fan was making a loud buzzing noise and was changing rpms. So i took out my motherboard and fixed it. Now i put my motherboard back in and connected everything, Now i can turn on my comp and all the fans and stuff turn on but my powersupply makes a weird screeching noise, and the comp wont boot up. So what should i do i dont know what i did wrong if someone could give me some advice or a motherboard cord refrence manual it would be greatly aprreciated.

Heres what i have.

ASUS A8N-Sli Basic nforce4 mb motherboard

600 watt powersupply


Well hopefully you guys can help thanks.