my newly built pc will not turn on.

[CatchPhrase]

Not sure where to post this but I just built a new comp and it will not turn on.
the psu fan does not spin or anything.
Absolutely nothing happens.

 

[Dadofamunky]

What are your specs? The supply is either defective or it just doesn't have enough oomph for your collection of components. I had a very similar experience the other day. Swapping a new 650W unit sets things right good and proper.

 

[Dadofamunky]

Also, double-check ALL your connections to the motherboard. Then, reduce all your component power connections to the barest minimum (a single HD and the video card, for example) and see if the system will POST. If not, it's likely defective.

 

[CatchPhrase]

I Have a gigabyte p35 ds3l and a 8600gt with a Pentium e2140.
I connected only the 24 pin mobo and the 4 pin atx on the mobo and no post.
Then I connected just the dvd rom and i got nothing.
Maybe I broke the cpu or mobo when installing it?
Please help me.

 

[DSF]

Your 450W is plenty of power, unless you got a defective unit. Unlikely, but possible.

Take the motherboard out of the case and rest it on a nonconductive surface, like the cardboard box it came in. Install only the bare necessities. Try to power the computer on again. If it powers on, then the problem was most likely a short against the back of the case. Check very carefully to make sure that your standoffs are in the right places, no screws fell behind the motherboard, etc.

 

[crisium]

It might be shorting. Make sure it's in the case right, not touching anything it's not supposed to. Try building it on top of anti-static bags to be sure (but don't be careless in doing this). I mean take the motherboard out of case, and have it on an anti-static bag. I have seen this 'fix' several computers as it was being shorted out somewhere in the case.

edit:Ah, same thing DSF is saying basically.

 

[CatchPhrase]

Is the psu fan supposed to spin when I turn it on?

 

[Avalon]

Yes.

Check your front panel power/reset/HDD/LED jumpers. Colored wire is positive, white is negative, except when there's black. A couple times a while back I had put the power button jumper in the wrong spot, so the system didn't appear to have any power.

If you want a quick check to verify your board is getting power from the PSU...remove all of those front panel jumpers completely. Take a flat head screwdriver and touch the two pins that represent where your power jumper goes. That should short start up the system. If not, your PSU is dead.

*Edit*
If you want to be really sure, do what the other guys in the thread mentioned, and then try this. I did have a case once where I couldn't get my system to power up or short it on while installed in the case, but once I removed the board I could do both.

 

[Tempered81]

ill betcha he mounted the motherboard wrong, and its grounding out when he tries to power it on. take the mobo out of the case, set it on top the cardboard box, put a chip & ram in it, plug the power supply into it, and power it up. see if things spin and go beep then. if thats the case, you put the mobo in the case wrong.

you cannot have any metal contacts of the back of the mobo touch the metal of the case. thats what the plastic spreaders & paper rings are for. use them as washers on the back of the mounting screws.

 

[CatchPhrase]

Ok I took it out and tried to power it up and got nothing.
I got it from newegg do I send it back?

 

[SkidPad]

Alright, I gotta ask...is the "main" switch on the back of the power supply turned on? Most psu's come out of the box with the switch off...

 

[ronnn]

Originally posted by: SkidPad
Alright, I gotta ask...is the "main" switch on the back of the power supply turned on? Most psu's come out of the box with the switch off...

Now that is something I would do. Last time it was the cpu improperly seated.

 

[SkidPad]

^^^^ We've all made goofy mistakes, but I figured since the OP hasn't indicated, I'd ask the obvious question - which may not be obvious if this is the first system he's built.

 

[Dadofamunky]

Originally posted by: DSF
Your 450W is plenty of power, unless you got a defective unit. Unlikely, but possible.

Take the motherboard out of the case and rest it on a nonconductive surface, like the cardboard box it came in. Install only the bare necessities. Try to power the computer on again. If it powers on, then the problem was most likely a short against the back of the case. Check very carefully to make sure that your standoffs are in the right places, no screws fell behind the motherboard, etc.

He's right. For that rig, 450 is good. Especially since Corsairs are supposed to be good (and are priced accordingly).

 

[CatchPhrase]

It works, turns out that i had to push the power button after hooking it up to the mobo.

 

[Tempered81]

Originally posted by: CatchPhrase
It works, turns out that i had to push the power button after hooking it up to the mobo.

you figure it out? what was your problem?

 

[covert24]

Originally posted by: CatchPhrase
It works, turns out that i had to push the power button after hooking it up to the mobo.

 

[Dadofamunky]

Originally posted by: CatchPhrase
It works, turns out that i had to push the power button after hooking it up to the mobo.

 

[imported_Scoop]

Yeah, you usually have to press the power button to power up the system..

 

[Hauk]

Originally posted by: Scoop
Yeah, you usually have to press the power button to power up the system..

:laugh:

He was asked about the switch on the PSU. Maybe that's what he meant. Glad you're running OP.

 

[DSF]

Enjoy your rig!

 

[OhSnap688]

When I was swapping my computer to another case it wouldn't turn on, and the simple problem for me was I connected a cable that wasn't supposed to be connected.

Did you not know a power switch turns computers on? lol just teasing

 

[Avalon]

Originally posted by: CatchPhrase
It works, turns out that i had to push the power button after hooking it up to the mobo.

You mean the power supply switch?