System does nothing when power button is pressed.

Shlutka · Mar 8, 2016

I've just built a new PC, and I installed a new power supply in my old one to give to my mother. The problem is, it's not doing anything. Everything worked before, the only thing I've changed is RAM, and power supply.

I've made sure that the following are plugged in:
8 pin CPU
22 pin motherboard
gpu
hdd
and fans.
I've tried running with 1 stick of RAM, and i've also tried running without the gpu plugged in.

Dark Lord of Tech · Mar 8, 2016

List your complete specs.

Make sure PSU is actually on.

Double check power connections and front panel.

icraft · Mar 8, 2016

Do what blackbird says first, and then revisit this post.

Any noise at all? Fans trying to spin?

Shlutka · Mar 8, 2016

Motherboard: Gigabyte 990FXA-UD3
CPU: AMD FX-8320 @ 4.5ghz
CPU Cooler: Hyper212 EVO
Case: Corsair 230t
GPU: Sapphire TRI-X R9 290
HDD: Seagate Barracuda 1tb
RAM: G.Skill Ripjaws X 1600mhz
PSU: XFX XT 600

Yes I've double checked, and yes, the PSU is on.

Shlutka · Mar 8, 2016

icraft :

0 noise at all.

icraft · Mar 8, 2016

What is the PSU?

Shlutka · Mar 8, 2016

icraft :

XFX XT600

turkey3_scratch · Mar 8, 2016

I would suspect the power switch cable itself to be bad or loose since fans have no reaction. Try turning on the PSU via shorting the power switch pins with something like a screwdriver, or do a paperclip test to test the PSU.

azaran · Mar 8, 2016

Well since you double checked the physical connections, best thing from there would be to take the case button out of the equation and see if its a case problem before you start having to play with known good PSU's or ripping the system apart. Since your motherboard doesn't have a power button on board, you can try manually triggering the power with a screwdriver at the front header pins. If it powers on, it means there's a problem with the cases power button, if it doesn't then it at least takes that simple potential issue out of the mix.

Shlutka · Mar 8, 2016

turkey3_scratch :

The problem is, I can't access the switch with the corsair 230t, it's blocked off.

azaran · Mar 8, 2016

Not the physical switch on the case, but the pins the switch connects to on the motherboard.

pish_flaps · Mar 8, 2016

My recent new build had the same problem - nothing makes your heart sink quite like an expensive new build that won't boot! The problem in my case was that that the motherboard's BIOS needed flashed so the mobo and RAM would talk to each other. Give it a go if the other solutions don't work!

Shlutka · Mar 8, 2016

azaran :

I didn't change them, all I did was switch out the power supply. They worked before.

turkey3_scratch · Mar 8, 2016

pish_flaps :

You can't flash the motherboard if the PC doesn't turn on, and you probably had a different issue honestly.

turkey3_scratch · Mar 8, 2016

Shlutka :

This is what we're talking about:

This does the same thing as pushing a working power button.

Shlutka · Mar 8, 2016

turkey3_scratch :

Shlutka :

This is what we're talking about:

This does the same thing as pushing a working power button.

I tried switching, still is not working.

azaran · Mar 8, 2016

Shlutka :

Yep we know. Just trying to remove all the possible problems. By confirming the board does or does not turn on when manually switched you're taking out possible issues that could complicate matters. Buttons are physical switches and over time they degrade. With something as simple as an on/off switch it could just be fate decided to pick now to kill it off. Its likely not the culprit but I've seen a bad switch turn a simple problem in to a day long diagnostic pain in the ass.

turkey3_scratch · Mar 8, 2016

Wait a second, you said in your original post you installed a new PSU, and gave your old one to your mom, and it was working before that. My question is what made you replace the PSU?

azaran · Mar 8, 2016

Shlutka :

turkey3_scratch :

I tried switching, still is not working.

Well was with a shot. Now comes the fun of testing it out with known good parts. Do you still have access to your old PSU and RAM?

Shlutka · Mar 8, 2016

azaran :

Shlutka :

Yep we know. Just trying to remove all the possible problems. By confirming the board does or does not turn on when manually switched you're taking out possible issues that could complicate matters. Buttons are physical switches and over time they degrade. With something as simple as an on/off switch it could just be fate decided to pick now to kill it off. Its likely not the culprit but I've seen a bad switch turn a simple problem in to a day long diagnostic pain in the ass.

I don't really know what more I can do. I've double checked everything and it should work.

Shlutka · Mar 8, 2016

turkey3_scratch :

No, I built my new PC, used some parts from the old one, including the power supply. So with my old PC, I had to get a new PSU, RAM, and HDD for it.

turkey3_scratch · Mar 8, 2016

Well, if you made sure the power switch was plugged into the exact correct spot as your motherboard manual says (also make sure the positive side of the power switch cable is not plugged into the negative; common mistake), I'd then think motherboard is DOA. BUt really make sure the power switch cable positive is not plugged into the negative side.

Shlutka · Mar 8, 2016

turkey3_scratch :

It can't be dead on arival, I used it a few days ago.

turkey3_scratch · Mar 8, 2016

But you just said - grr.

Okay, let's make this easier. List all the hardware that was in this computer when it was working. Then, make a list of all the hardware you have tried changing out, when it stopped working.

Shlutka · Mar 8, 2016

turkey3_scratch :

Sorry for the frustration sir.

Before:
Motherboard: Gigabyte 990FXA-UD3
CPU: FX-8320
CPU Cooler: Corsair H100i GTX
RAM: 2 x 4gb G.Skill Ripjaws X 1600mhz
PSU: Rosewill Photon 750w
GPU: R9 290
Storage:
1 x 240gb SSD
1 x 1tb HDD

After:
Motherboard: Gigabyte 990FXA-UD3
CPU: FX-8320
CPU Cooler: Hyper 212 EVO
RAM: 2 x 4gb G.Skill Ripjaws X 1600mhz
PSU: XFX XT600
GPU: R9 290
Storage:
1 x 1tb HDD

System does nothing when power button is pressed.

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