so i just got all the parts today for my first gaming pc build close to $400 because im on a budget so i dont have a graphics card. but i installed everything and screwed in the motherboard but left out a few screw in because they didnt give my enough. and i would say i left out at least 3 to 4 screws out of at least 10. but installed the $55 AMD, the $50 650W power supply to my $111 motherboard but didnt install the peripheral cable because i didnt see and connectors for it. and also had 2 4G ram sticks and a 1 tb hard drive. and when i turned it on the power button on the back of the power supply the motherboard power light came on, on the inside and when i hit the power button on the outside just the fans, and LED lights came on only when i held the power button but my power supply was clicking like it was having trouble starting up. Can someone please help?