Is it my motherboard?

[jswiercek]

The other day I left for work with my computer on, I come home and it's off, when I try to turn it back on the LED fans light up and then go back off. I ask if we had a power surge or anything and we didn't.

I did get it to boot up for about 30 seconds once and then it turned back off (unfortunately I didn't have the monitor turned on at the time) and haven't gotten anything since.

I noticed that the Ethernet LEDs are on still (and go out if I unplug the PSU) leading me to believe that it isn't my PSU that has gone bad.

Is there anything other than the motherboard that could cause my computer to act this way? I've only had it since the beginning of July.

Specs:
Nzxt Apollo Gaming Tower Case w/420W Power Supply
AMD Athlon™64 X2 6000+ Dual-Core CPU w/ HyperTransport Technology
MSI K9N4 500 SLI
2x 512MB PC2-6400 RAM - can't remember the brand (came with computer)
2x 1GB PC2-6400 RAM - GSkill (ordered off NewEgg and installed on my own)
EVGA NVIDIA GeForce 8600GTS 256MB
250 GB HARD DRIVE [Serial-ATA-II, 3Gb, 7200 RPM, 8M Cache]
18X Dual Format/Double Layer DVD±R/±RW + CD-R/RW Drive
Microsoft Windows Vista Home Premium
Thermaltake V1 CPU Heatsink + Fan

Thanks for your help

 

[Tmagic650]

Even though the power seems to be there, try another power supply first

 

[jswiercek]

Well, we couldn't exactly figure out what we were looking for to start the computer other than the power switch, so my friend looked up how to test if the power supply was working or not and we got no response from the PSU, so we believe that this is the problem, damned outsourced tech support I hate you. (at least I get a new mobo)

Thanks for your help