Solved Computer turned off suddenly, now doesn't turn on

by the way praeambulus do you have a micro atx chassis or a full atx? there would be a difference in psu size. from the looks of it, your mobo is a micro atx, but im not sure what you have it sitting inside of...

Edit: no it just looked like a micro atx from the pic. I checked the specs and it is an atx.

http://www.gigabyte.us/products/product-page.aspx?pid=2885&dl=1#sp

either way, just make sure you get the right form factor :cool:
 
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My Computer My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Pandora (computer name)
OS
Windows 7 x64 / Windows Server 2008 / Linux (Redhat & Deb distros) / OS X / More
CPU
AMD FX 8150 Eight-Core Processor 4.23 Ghz OC
Motherboard
ASUS SaberTooth 990FX
Memory
G.SKILL Ripjaws X Series 32GB (4 x 8GB) DDR3 SDRAM 1333
Graphics Card(s)
2X Radeon HD 4870 CrossFire X
Sound Card
Onboard and loving it
Monitor(s) Displays
2x HP w2480 Wide LCD
Screen Resolution
1920x1200 each
Hard Drives
RAID (6x0 Seagate Barracuda 7200 rpm 32 MB cache 500Gb SATA)
PSU
Antec 850 Watt
Case
Antec 900
Cooling
Lots of fans
Keyboard
Logitech
Mouse
Rat 9
Internet Speed
40 Mbps Down 5 Mbps Up
Antivirus
AVG
Browser
Chrome, Firefox, IE
Other Info
My main desktop
I hate to guess, but my initial reaction is Power Supply. But the UPS could be a complicating factor.

First, I would remove the UPS from the system and test.

Then, try another power supply in your system or try your power supply in another system. Do you have access to another PS you could test with?

Another thing you can try is to disconnect all external devices, all drives, and any other power draws that you can and see if the system will boot with just basic components: PS, MB/CPU, RAM, Graphics.

If we can eliminate the power supply as the cause (prove that it is good) then we can move on to the other potential causes.

You knew what the problem was before it was cool :cool:
 

My Computer My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Pandora (computer name)
OS
Windows 7 x64 / Windows Server 2008 / Linux (Redhat & Deb distros) / OS X / More
CPU
AMD FX 8150 Eight-Core Processor 4.23 Ghz OC
Motherboard
ASUS SaberTooth 990FX
Memory
G.SKILL Ripjaws X Series 32GB (4 x 8GB) DDR3 SDRAM 1333
Graphics Card(s)
2X Radeon HD 4870 CrossFire X
Sound Card
Onboard and loving it
Monitor(s) Displays
2x HP w2480 Wide LCD
Screen Resolution
1920x1200 each
Hard Drives
RAID (6x0 Seagate Barracuda 7200 rpm 32 MB cache 500Gb SATA)
PSU
Antec 850 Watt
Case
Antec 900
Cooling
Lots of fans
Keyboard
Logitech
Mouse
Rat 9
Internet Speed
40 Mbps Down 5 Mbps Up
Antivirus
AVG
Browser
Chrome, Firefox, IE
Other Info
My main desktop
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