Sign in with
Sign up | Sign in
Your question

New rig won't power up!

Last response: in Systems
Share
January 25, 2012 9:26:47 PM

Hey everyone!

So today i just bought all the components for my new rig!

Problem is, it won't power up. It's just dead, nothing happens when i press the power button.
This is the first time i ever set up a computer before, but i have followed instructions both from internet, the manuals from all the components and common sence.

These are the components:

NZXT Hades (Chassi)
Gigabyte Radeon HD6850 OC
AMD FX-8120
Fractal Design 650w
HyperX 8gig

Thanks!

More about : rig power

January 25, 2012 9:33:49 PM

Found a few things i'm gonna check out! Sorry, been sick for a few days, dead tired... Should have maybe waited a bit to do this but, hey, i'm excited hehe!

Thanks!
Related resources
January 25, 2012 10:15:31 PM

Ok, still not starting... This is no fun at all =(
January 25, 2012 10:36:49 PM

If you don't have another system to test the individual components, you might be forced to RMA the motherboard.
January 25, 2012 10:37:48 PM

Have you paperclip tested the PSU? I don't have much faith in letting a Fractal PSU power a system.
January 25, 2012 10:38:45 PM

Have you tried paperclipping the PSU?
Are there any led lights on the motherboard?
If yes then can you uplad a photo of your motherboard?
Did you plug the CPU power in?
Have you correctly connected the power button from the case to he mobo?

Try removing all components from case and try booting on the mobo cardboard box (make sure the case wasn't shorting out the mobo)
a c 122 B Homebuilt system
January 26, 2012 10:48:56 AM

First look here in case you overlooked something simple:
http://www.tomshardware.co.uk/forum/274745-13-step-step...

Then work systematically through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
I mean work through, not just read over it. We spent a lot of time on this. It should find most of the problems.

If not, continue.
The following is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.
http://www.tomshardware.com/forum/261145-31-read-postin...

I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different, but they all use a single short beep for a successful POST.

Breadboard - that will help isolate any kind of case problem you might have.
http://www.tomshardware.com/forum/262730-31-breadboardi...

Breadboard with just motherboard, CPU & HSF, case speaker, and PSU. Breadboard with just motherboard, CPU & HSF, case speaker, and PSU. At this point, if you do not have a system (internal case) speaker, you really need one.


Make sure you plug the CPU power cable in. The system will not boot without it.

I always breadboard a new build. It takes only a few minutes, and you know you are putting good parts in the case once you are finished.

You can turn on the PC by momentarily shorting the two pins that the case power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.

If no beeps, LED's, or fan activity:

Check for line power at the PSU input. Extension cords, power strips, and power cords do fail.

If you have power and no beeps, suspect components in likely order are PSU, motherboard, and CPU.

Running fans and drives and motherboard LED's do not necessarily indicate a good PSU. In the absence of a single short beep, they also do not indicate that the system is booting.

At this point, you can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.

You can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to short the green wire to one of the neighboring black wires.
http://www.youtube.com/watch?v=5FWXgQSokF4&feature=yout...

A way that might be easier is to use the main power plug. Working from the back of the plug where the wires come out, use a bare paperclip to short between the green wire and one of the neighboring black wires. That will do the same thing with an installed PSU. It is also an easy way to bypass a questionable case power switch.

This checks the PSU under no load conditions, so it is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.

If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card.

Silence, long single beeps, or series of short beeps indicate a problem with the memory. If you get short beeps verify that the memory is in the appropriate motherboard slots.

Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST.
At this point, if the system doesn't work, it's either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.

Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.
January 26, 2012 11:43:37 AM

I found the problem! Went through the guide and got interested on what breadboarding is, something Lowlyworm recommended me 2 do. I took out everything from the chassi, connected it, but a screwdriver on the power pins and voila! it started running. So it's the god damn chassi cables... i tried them on both polarities, so what should i do..?

Thanks for the awesome help so far!
a b B Homebuilt system
January 26, 2012 12:54:20 PM

Z3pSk1 said:
I found the problem! Went through the guide and got interested on what breadboarding is, something Lowlyworm recommended me 2 do. I took out everything from the chassi, connected it, but a screwdriver on the power pins and voila! it started running. So it's the god damn chassi cables... i tried them on both polarities, so what should i do..?

Thanks for the awesome help so far!


Try it now. I had the switch off down here.

Just kidding. Not being able to see what you're doing, I have to guess, and what I'm guessing is that you are plugging the case wires into the wrong places on the motherboard. What motherboard do you have?
!