Just-Built Computer Not Working

[Eagle784]

I turn the computer on, but the monitor doesn't detect a signal. The Case fan, heatsink fan, and video card fan all turn on.

There are no beeps, and the hard drive doesn't appear to be turning on at all. Thanks for your help.

 

[Atheus]

Most likely you have wired something wrong, seated something badly, or maybe caused a short. I'd take it apart and try building from scratch again, probably without a case. Make sure all the power connectors (PCI-E card, all mobo connectors) and such are hooked up right.

You done this before?

 

[Eagle784]

Originally posted by: Eagle784
I turn the computer on, but the monitor doesn't detect a signal. The Case fan, heatsink fan, and video card fan all turn on.

There are no beeps, and the hard drive doesn't appear to be turning on at all. Thanks for your help.

This is my first time doing this.

The video card doesn't require a direct PCI-E power connection, and it's the only card connected to the mobo. There's also a light on the video card that turns on.

I rechecked the power to the motherboard, and the ram fittings again.

I hooked up my hdd light to the message light on the motherboard, and it turns on and stays on constantly. Still no beeps, though. My motherboard model is the Gigabyte DS3.

Thanks for helping me.

 

[Atheus]

Do you have it out of the case? You sure you have all the motherboard power plugs plugged in? I mention this again because it's a very common mistake - mine requires 3 plugs.

What is the make/model of your vid card, RAM, and most importantly power supply?

 

[phios]

Also, check to make sure that your speaker is plugged into the correct pins on the motherboard. It could be a power supply issue, a cpu issue, or a motherboard issue. But, like the previous poster said, pull the system out of the case, put it on an ESD bag, and attempt to run it with just the CPU, Video card, and ram installed. Make sure you see it post before you install it into your case.

 

[Eagle784]

Rechecked that the motherboard was plugged in; it's 24-pin, and the power supply need two plugs for it. I haven't been able to take it out of the case yet; I'm trying to do it without removing the heatsink, I'll let u kno when I do it this afternoon.

Video card: eVGA nVidia 7600 GT
RAM: OCZ Gold 2x512MB DDR2-800
PSU: Antec Smartpower 450W (came with Sonata II case)

I tested the PSU voltage on one of the 4-pin molex connectors; it showed a steady 12V.

Part of the problem is I dont have another system to try out any of these parts. Does anyone have any suggestions on other ways to test the parts?

 

[Eagle784]

Removed the motherboard from the case; still the same result:

Message light stays solid, no beeps, and no video signal.

Thanks for your help.

 

[ScrapSilicon]

clear your cmos settings...appears this mobo has some issues ..from here...

Cons: CL4 ram is incorrectly detected as CL3 and the system won't boot. You have to boot with CL5 ram first and manually set the bios to CL4.

..

 

[Eagle784]

I'm using CL5 ram, but tell me how to clear the cmos settings please. Thanks.

 

[mechBgon]

The manual tells how to clear the CMOS. Short version: unplug computer from wall, remove the CMOS battery, move the CLRTC jumper to pins 2&3 for 20 seconds, move the jumper back to pins 1&2, put the battery back in its holder, and plug the system in again.

Could you post some pics of your system's interior, sometimes that helps find where you made a mistake. Also give a complete spec list?

 

[Eagle784]

Cleared CMOS, no change in behavior.

Spec list"
Pentium D 915 2.8 GHz 2x2MB Cache
Gigabyte DS3 motherboard, Intel 965 Chipset
OCZ Gold 2x512MB PC2-6400 CL 5-5-5-15 1.9V
Antec Smartpower 450W PSU
eVGA nVidia 7600 GT KO 256MB DDR3 PCI-e 16x
6GB Western Digital IDE HD

(the hdd is the only component that doesn't turn on when I turn the power on)

 

[mechBgon]

Ok, to start with the easy thing, do you have the ATX12V cable plugged in? It has two yellow wires and two black wires, like this: pic Note that it's different from the 4-pin part of the ATX 2.0 24-pin main cable, they are not interchangeable.

It goes in the receptacle that's most of the way up the rightmost edge of the board in this pic.

 

[Eagle784]

Originally posted by: mechBgon
Ok, to start with the easy thing, do you have the ATX12V cable plugged in? It has two yellow wires and two black wires, like this: pic Note that it's different from the 4-pin part of the ATX 2.0 24-pin main cable, they are not interchangeable.

It goes in the receptacle that's most of the way up the rightmost edge of the board in this pic.

This was what's wrong. Thanks you so much, it's working great now!

 

[mechBgon]

Originally posted by: Eagle784

Originally posted by: mechBgon
Ok, to start with the easy thing, do you have the ATX12V cable plugged in? It has two yellow wires and two black wires, like this: pic Note that it's different from the 4-pin part of the ATX 2.0 24-pin main cable, they are not interchangeable.

It goes in the receptacle that's most of the way up the rightmost edge of the board in this pic.

This was what's wrong. Thanks you so much, it's working great now!

Excellent, have fun! 😎

 

[Atheus]

Originally posted by: Eagle784

Originally posted by: mechBgon
Ok, to start with the easy thing, do you have the ATX12V cable plugged in? It has two yellow wires and two black wires, like this: pic Note that it's different from the 4-pin part of the ATX 2.0 24-pin main cable, they are not interchangeable.

It goes in the receptacle that's most of the way up the rightmost edge of the board in this pic.

This was what's wrong. Thanks you so much, it's working great now!

LOL, I mentioned this in the very first reply :roll: :laugh:

 

[Eagle784]

Originally posted by: Atheus

Originally posted by: Eagle784

Originally posted by: mechBgon
Ok, to start with the easy thing, do you have the ATX12V cable plugged in? It has two yellow wires and two black wires, like this: pic Note that it's different from the 4-pin part of the ATX 2.0 24-pin main cable, they are not interchangeable.

It goes in the receptacle that's most of the way up the rightmost edge of the board in this pic.

This was what's wrong. Thanks you so much, it's working great now!

LOL, I mentioned this in the very first reply :roll: :laugh:

I kno! I can be such an idiot sometimes.