No power to mobo, New power supply, New mobo.... still no luck HELP!

[BlindGam3r]

Hello,

 

Thanks all for replies in advance, So a few months back I built a system on a Gigabyte Z97X-SOC, I am not doing any crazy over clocking in fact everything is still running at stock, it was all running fine and then one day I came to turn it on and it just didn't, and on this motherboard like quite a few now days you have a little button on the board that lights up when the board gets power and even that wasn't lighting up, So I tested the power supply and that seemed to be fine, this motherboard has one of the error code displays on the board and I read through the manual and it seemed to me that if it was anything but the actual mobo or PSU that I would get an error code. So I contacted Amazon and got the mobo replaced because the power supply seemed to be fine, new mobo came put the system back together I had the same problem no power was getting to the mobo I wasn't getting the power light like you usually would. So i ordered a new power supply corsair rm750x and I just installed that and still no luck. I am really stuck with what to do next as I now have no clue what to try and this is where I need your help LTT community  again thanks for the replys in advance any help is greatly appreciated 

[HoiDaniel]

Maybe it's just the power outlet from the wall that isn't functioning right. Did you try to use another powersocket?

[BlindGam3r]

1 minute ago, HoiDaniel said:

Maybe it's just the power outlet from the wall that isn't functioning right. Did you try to use another powersocket?

Yeah I thought that as well, I have tried like 3 or 4 different outlets one of which is running my other computer fine

[HoiDaniel]

2 minutes ago, BlindGam3r said:

Yeah I thought that as well, I have tried like 3 or 4 different outlets one of which is running my other computer fine

Did you try another power-group? Like the livingroom instead of your own room, or the other way around?

[BlindGam3r]

7 minutes ago, HoiDaniel said:

Did you try another power-group? Like the livingroom instead of your own room, or the other way around?

Just tried that as well, still no luck

[Rushfriend]

Just now, BlindGam3r said:

Just tried that as well, still no luck

Have you took a look for the power frequency in your country and what the PSU can take?

 

Some PSU's can't operate at certain frequency's....

 

Here is a overview with the frequency's around the world: https://en.wikipedia.org/wiki/Utility_frequency#/media/File:Voltage_and_frequency.png

[Naeaes]

It's definitely power-related. Take a look inside the USB headers. A short in it looks something like this. If the +5VDC pin contacts the collar, it'll short circuit and usually cause your issue. If there's nothing wrong with them and nothing wrong with your external devices, you should assemble just a bare minimum setup outside the case. Just the PSU, board and CPU with a cooler. You could try even without the CPU at first. It's not gonna pass POST but it'll rule out these components if it powers up. Add a stick of ram, try it, add a GPU, try it, add a keyboard, try it... Once it it finally starts acting up again, you should have an idea of what's causing it.

 

Just a note here. While unlikely, it's possible that a seemingly unrelated component is bricking your parts. Off the top of my head, a bad HDD could have a short circuit in it that kills the PSU and the PSU kills the board. You buy new stuff and it kills them off the bat... This is one of several good reasons to have a shop look into it. You can have all the knowhow, spare parts and tools in the world but if there's a bad component that breaks other components, you really should have someone else destroy their parts rather sooner than later. 

[BlindGam3r]

4 minutes ago, Rushfriend said:

Have you took a look for the power frequency in your country and what the PSU can take?

 

Some PSU's can't operate at certain frequency's....

 

Here is a overview with the frequency's around the world: https://en.wikipedia.org/wiki/Utility_frequency#/media/File:Voltage_and_frequency.png

Im in the UK we use 220-240v 50Hz on the power supply box says 100V - 240V and 47Hz - 63Hz, so I think this means that its okay? 

[BlindGam3r]

3 minutes ago, Naeaes said:

It's definitely power-related. Take a look inside the USB headers. A short in it looks something like this. If the +5VDC pin contacts the collar, it'll short circuit and usually cause your issue. If there's nothing wrong with them and nothing wrong with your external devices, you should assemble just a bare minimum setup outside the case. Just the PSU, board and CPU with a cooler. You could try even without the CPU at first. It's not gonna pass POST but it'll rule out these components if it powers up. Add a stick of ram, try it, add a GPU, try it, add a keyboard, try it... Once it it finally starts acting up again, you should have an idea of what's causing it.

 

Just a note here. While unlikely, it's possible that a seemingly unrelated component is bricking your parts. Off the top of my head, a bad HDD could have a short circuit in it that kills the PSU and the PSU kills the board. You buy new stuff and it kills them off the bat... This is one of several good reasons to have a shop look into it. You can have all the knowhow, spare parts and tools in the world but if there's a bad component that breaks other components, you really should have someone else destroy their parts rather sooner than later. 

Yeah at this point, I think I am just going to do that take it apart and just build a bare minimum system and see if I can work something out from there

[Rushfriend]

1 hour ago, BlindGam3r said:

Im in the UK we use 220-240v 50Hz on the power supply box says 100V - 240V and 47Hz - 63Hz, so I think this means that its okay? 

No problem there, could have been the issue  You never know.

I strongly advice to use the method Naeaes pointed out to troubleshoot further.

Good luck!

[0x1e]

1 hour ago, BlindGam3r said:

Yeah at this point, I think I am just going to do that take it apart and just build a bare minimum system and see if I can work something out from there

Have you read that?

See if any of it helps you at all.