Computer not starting up, more in body..

I came home one day from being out of town for the weekend. I came home and turned my computer on, for a moment it started to boot and then powered off. I attempted to power it on again and it would not turn on. I tried the computer in a different location, same result.

I contacted the company I bought the pre-built computer from and in talking with the tech he "determined" it was either the PSU or the motherboard. I went out and bought another PSU since the computer would not turn on. Hooked it up, all the cords, same thing. Talked with the techs again and we determined we would send in the mobo and chip thinking it may be either of those.

They were sent back, I attempted to use them in the same tower with all the same components I had from the purchase. Still nothing. I thought it may be the tower after talking with a friend.

Here's the previous computer set up, bought from newegg supplied by ipower. Thought it would be a good starter computer and over time up-gradable.

http://www.newegg.com/Product/Product.aspx?Item=N82E16883227314

Specs:

Model: Gamer Power 567D3

Gaming & Entertainment

Processor: AMD Phenom II X4 925 (2.8GHz)
Processor Main Features
64 bit Quad-Core Processor
Cache Per Processor
4 x 512KB L2 Cache
Memory
4GB (2GB x 2) DDR3 1333
Hard Drive

1TB SATA II

Optical Drive 1
24X DL DVD+/-RW Drive

Graphics
ATI Radeon HD 5570 1GB
Audio
Sound card - Integrated
Ethernet
Gigabit Ethernet

Power Supply
480W (This was upgraded to Thermaltake TR2 600W after the mobo and chip were sent back.)

Operating System
Windows 7 Home Premium 64-bit

Special Features

NZXT GAMMA Gaming Tower (Also upgraded to: Rosewill Blackhawk Gaming ATX Midtower case) http://www.newegg.com/Product/Product.aspx?Item=N82E16811147107

CPU
CPU Type
Phenom II X4
CPU Speed
925(2.8GHz)
L2 Cache Per CPU
4 x 512KB
L3 Cache Per CPU
6MB
CPU Socket Type
AM3
CPU Main Features
64 bit Quad-Core Processor

Graphics
GPU/VPU Type
ATI Radeon HD 5570
Graphics Interface
PCI Express 2.0 x16

Memory
Memory Capacity
4GB DDR3
Memory Speed
DDR3 1333
Form Factor
DIMM 240-pin
Memory Spec
2GB x 2

Hard Drive
HDD Capacity
1TB
HDD Interface
SATA II

Optical Drive
Optical Drive Type
DVD±RW
Optical Drive Spec
24X DL DVD+/-RW Drive

Audio
Audio Chipset
Integrated
Audio Channels
8 channels

Communications
LAN Chipset
Integrated
LAN Speed
10/100/1000Mbps

Front Panel Ports
Front USB
2
Front Audio Ports
2

Back Panel Ports
COM
1
LPT
1
PS/2
2
Video Ports
1 VGA
Rear USB
4
RJ45
1 port
Rear Audio Ports
3 ports

Expansion
External Bays
4 x external 5.25" drive bays
Internal Bays
6 x internal 3.5" drive bay
PCI Slots (Available/Total)
1 x PCI-Express x16
1 x PCI-Express x1
2 x PCI

I recently received the new tower and transferred the pieces over to it.

Highlight: it powers on! CPU fan works, graphics card fan runs also, but does not show on the monitor/screen. Removed the ram to see if there was beeping I could hear, nothing given (may not have been doing that part right?) Removed the graphics card, plugged monitor into mobo directly, still nothing. Read other things that said it may be something that needed to reset the bios, removed the battery turned it on without the battery, then replaced the battery back into the mobo adter turning it off (all unplugged, of course).

I did notice though, before with the old mobo there was a green light that came on before the issues. Since I have had the new one back, I have not seen a light, but I don't see a light where it was before. Everything is plugged in as it should be, any help/insight would be great!

Thanks in advance.

I will have to get a component for the VGA, why do you recommend the VGA? I will also look into the bios thing, will post more about it as necessary.