1st build not booting there only the green led on mobo on

[Guest]

hi i need some help with my first build and i think i done ok but there only a green light on the motherboard and no fans spinning.also no boot i made sure all the cables are pushed in could i have some assistant with what to do next.also im new to this side of computers so easy read plz

 

[Guest]

my specs
m4a87td mobo

750 wattspsu

amd phantom x4 black type

corair xms3 1333mhz 4 gb ram

nvdia 9800gt

plz can i have fast help im waiting bye my pc

 

[Guest]

ok i tryed reseating the cpu and heatsink and plug the power 24pin cable again
also tryed the 4 pin power i placed it all ways

and i taken out my 9800gt and all ram and fans not cpu

i inserted this rest and power cable that came with the case thats two pins
i brought all these objects brand new so i worried that i broken something and this is my sons birthday money

i need hlp fuys because im craping my self i feel so bad
hope i have better luck 2moz
i

 

[KealaTech]

Starting from the beginning...

Did you install the motherboard to the case using the proper mount posts? They are usually made up of brass material.

Just a question to help you out.

 

[KealaTech]

Also on some power supplies, on the back there is a switch. Depending on your country and location, you'll need to select the proper voltage. USA = 115V