My comp will not turn on, help plz

[terminator]

So i think it is the power supply, that little green light on the inside is ON but like i said the comp will not turn on. one thing though, i didn't put all the screws into the mother board just the corners and 1 or 2 in the middle, reason i did that is i heard from someone that fried a few mother boards because he had to many screws in it, but i might have miss understood. i did go in and dust everything as best i could and i checked the wire for the power button and the power cord.

here are my specs

ASUS M4A785TD-V EVO AM3 AMD 785G HDMI ATX AMD Motherboard

XFX HD-567X-YNFC Radeon HD 5670 (Redwood) 512MB 128-bit DDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

OCZ StealthXStream OCZ700SXS 700W ATX12V / EPS12V SLI Ready CrossFire Ready Active PFC Power Supply

AMD Phenom II X4 955 Black Edition Deneb 3.2GHz Socket AM3 125W Quad-Core Processor HDZ955FBGMBOX

G.SKILL 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model F3-12800CL9D-2GBNQ

 

[FuryRosewood]

are all connections accounted for? 12V power to cpu, 20+4 pin on the motherboard, the gpu has power, hdds and other accessories are connected, as that psu has more than enough total power to power up everything, tho it may be a possiblity that the psu is just bad

 

[terminator]

crap i think i put this in the wrong section....

but yeah every thing seems to be connected, i just heard from my dad (hes always the first one on it) that when he tried to turn it on the the blue led lights flickered then shut off so he unplugged the power cord and tried again, same thing. but its not doing anything now. and its giving of a sort of a burning smell, im pretty sure its coming from the psu

edit) i just read abunch of feedback on my power supply on new egg, around 55% of the ppl said they had a burning smell for a while then it just died. when i first bought the psu it didn't have to many reviews, or els i wouldn't have bought it.

 

[Manauffeuer]

if it smells like its burning then you need to replace it before it catches fire

 

[StrangleHold]

one thing though, i didn't put all the screws into the mother board just the corners and 1 or 2 in the middle, reason i did that is i heard from someone that fried a few mother boards because he had to many screws in it, but i might have miss understood.

Suppost to put a standoff under each hole that has a grounding strip around it.

 

[D@RKSID3]

If you can get hold of another PSU, use that to test before you go and buy another one, because if you've cracked the Mb or something and the PSU is fine it might be a waste of money. A burning smell coming from the psu though would pretty strongly indicate to me it was dead.