I just put a computer together with these parts and it doesn't start up or do anything when I plug in the power cord into the PSU and hit the On button on the case. Anyone have any idea what the problem could be?

GA-EP45-DS3R
Q6700 with a DTEK Fusion V2 mounted on it
Corsair DDR2-800 4 gigs(2 sticks)
PC Power & Cooling 750 watt PSU
EVGA 9800 GTX with a self installed EK full coverage waterblock
Seagate Baracude 750 gigs- SATA
1 DVD-RW- SATA

I have tried taking everything out case and putting it on the table to test for grounding issues within the case and it still didnt work. THese are all brand new parts so I hope its not a defective part.

The 24 Pin and the 4 Pin (or 8 pin) is plugged into the mobo right?

^1

Yes

Any beeps from the motherboard? If there are beeps, look and see what the beep code is in the motherboard's manual.

No beeps

Is the switch on the psu switched to on?

Hate to over simplify things but lets check basics like the wall socket is it working have you tried another electrical item in that socket?

Second power strip see if its working mite have a tripped fuse or something.

The PSU does the fan spin on it when it is plugged in.

Then RMA the MoBo.

The fan does not spin on when the PSU is plugged in. I know the wall socket is fine. Does this mean its a bad PSU?

OK. The PSU fan doesn't spin.

Check to see if the the PSU voltage selector switch (if it has one) is set to the proper line voltage - 115 volts in the US, 230 practically everywhere else.

Disconnect the PSU from everything. Use a bare paperclip and short the green wire to either black wire beside it. The PSU fan should turn on when you plug the PSU into the wall and turn on the power switch (if it has one) on the back.

Don't worry about shock. It's alow voltage, low current control line.

If the fan doesn't spin, the PSU is probably bad.

Since its a new build, take it down to the basics. Before you RMA the PSU try this to rule out the possibility of a short. This will cause your computer to not power on either. Have only the mobo, two sticks of RAM (dual channel config), your video card and boot HD only. Everything else leave unplugged, extra drives, CD-ROM, Floppy, extra cards all unplugged. If it still doesn't post, unplug boot HD, if it still doesn't post, take out memory, if that doesnt post take out video card and last thing to remove if that doesn't post is take out CPU. Even with all these things removed if your mobo and PS are good, it will attempt to post and give you beep code errors indicating missing mem, cpu, etc.

The reason for these steps is over the years I have had everything from a video card that was to tweaked in its slot because of bad case design that would cause the system to not post to a short in a floppy drive which made it look like the Power Supply or motherboard where bad when in fact they where fine. Taking your system down to the bare bones is the only real way to get at the individual parts that may be causing the issue. Good Luck

System will not POST without the CPU. The POwer up Self Test is one of the executable routines stored in the boot ROM (technically EAROM - Electrically Alterable ROM, otherwise you couldn't flash a BIOS). No CPU, no execution, no POST, no beeps.

Back to the PSU: having the fan start up does not necessarily indicate a good PSU.

For more details on troubleshooting a dead new build, see:
http://www.tomswiki.com/page/Troub [...] +New+Build

If the fan on the Power Supply doesn't even go on when i plug it in and turn it on does that mean the PSU is dead?

I haven't taken the time to read through this thread completely, but has anyone mentioned the fact there is a switch on the back of the power supply that needs to be turned on before the PSU will do anything???? Just a try...you wouldn't be the first builder to forget about this switch in the heat of the first boot :-)

Yes, I did. And I mentioned the voltage selector switch.

Has anyone suggested making sure that the power switch jumper is properly connected to the Motherboard? I know I had hissy fits trying to figure out which direction (+ & -) to put the jumper from my case to the motherboard. I got it right the first time, but it doesn't mean he/she did.