Pending OP Response PC not starting

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0kingskins0

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Aug 10, 2019
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Hi all. I've had this PC built for about 2 years without touching / changing anything. I have an I7 CPU, 1080 GPU and 1000w PSU. I usually leave this PC running daily, but 1 morning I came to it and it was swithed off when it should have been on. It now will not boot at all. Nothing happens when I press the power button, no fans spinning, nothing.

The first thing I noticed was that the LED light on the H100i water cooler which is usually on, even when the PC is off (I think) does not light up. My first thought was that the H100i I have has broken which is causing the system not to boot up because there is no cooling. However I could be mistaken if my memory is wrong and it does not light up when the PC is off.

The other thing is that there is an orange light lit up on the motherboard, so there IS power coming to the system.

As I say I've not touched the inside for a while, it's not a new system. So something has broke causing it to turn off and not start back up. My first thoughts are to get a new cooler for the I7, or a new power supply. Can anyone shed any light on what might be causing this? Obviously I want to get it working the cheapest possible way without replacing the whole system, it's just knowing where to start.

Thanks in advance.
 

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phillpower2

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Sep 9, 2016
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Welcome to PCHF 0kingskins0,

Can you post the brand and model name or number of the MB and PSU + let us know which version of the i7 it is that you have.

The other thing is that there is an orange light lit up on the motherboard, so there IS power coming to the system.
That looks like a button for manually starting up the computer when troubleshooting.

No light on the cooler does not look good to be honest.
 

0kingskins0

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Aug 10, 2019
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Thanks for the reply. I can't remember which I7 it is, something like I74... I think.

The motherboard is gigabyte z97x gaming gt and the PSU is Cooler Master V1000. When you say it does not look good, what exactly do you think the problem might be? Motherboard issue? Cooler? PSU? I'd buy something to replace what's broken but I have no idea what to buy first
 

phillpower2

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Wanted to know the exact CPU to check if it has integrated graphics, being a later i7 it most likely has.

Checked a couple of versions of gigabyte z97x and none of the user manuals show an onboard power on button.

No light on a cooler that normally has one when the computer is not even powered up could mean that it had stopped working while the computer was running and may have fried the CPU, too soon to say yet.

the PSU is Cooler Master V1000
Not a good PSU so don`t be too surprised if it has failed, Cooler Master in general are on the avoid list.

The amber light on the MB could be an information LED or it could as previously said be a manual power on button, what I suggest;

Disconnect the power cord from the wall socket.

Press the case power on button for twenty seconds or so to get rid of any residual charge in the system.

Ground yourself by touching a bare metal part of the case or the PSU.

Reach inside and press what looks like a manual power on button, post back and let us know if it does feel like a press in button, do nothing else for now.
 

0kingskins0

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Thank you, yes it is the I7 4790k and yes it has on board graphics.

Yes it is a button, I've already tried pressing it in a few different ways and nothing happenned. I've just ordered an air cooler which will arrive tomorrow so when that arrives I will remove the current cooler and check the CPU. At least with air coolers you can see if the fans work etc. This was my first water cooler so it's caused a bit of a problem in this situation.

I never had any problems with the PSU and the system is not running anywhere near the maximum wattage.

I would hope that if the cooler stopped working that the PC / MB were smart enough to detect over heating and switch itself off, no?
 

phillpower2

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Sep 9, 2016
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Good that you have internal graphics as it will help with troubleshooting.

I never had any problems with the PSU and the system is not running anywhere near the maximum wattage.
PSUs can fail at any time even good ones, the present PSU is old, out of warranty and not a good brand, many models of Cooler Master are included on the lemon list

See if you are able to manually activate the PSU, its a Corsair video and you do not need to even attach a fan but see the "how to" here


Tip
If using a computer and not a mobile phone, please avoid adding multiple posts while waiting for us to reply to your last, edit your last post to include anything that you wish to add, this will ensure nothing gets overlooked which can sometimes happen if a thread has more than one page, it also avoids filling up folks inbox
 

0kingskins0

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Aug 10, 2019
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Well there's certainly power coming from the PSU as it lights up the orange LED on the MB. I will wait until I have the cooler tomorrow before I satrt taking things apart as this would mean unplugging everything and messing around with a paper clip.

Thank you for your help
 

phillpower2

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Sep 9, 2016
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As a PSU puts out various voltages +3.3V, +5V and +12V it may appear that the PSU is working correctly but it is not, any significant drop of any output can prevent the system from booting up, the other scenario is a significant increase in the output which can be worse as it can fry one or more major components such as the MB, CPU, RAM, add on video card etc.

No problem as it is your call.

You are welcome :)
 

0kingskins0

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OK I have an update. Cooler is not here yet and I also ordered a new PSU to try. I have just taken the CPU out to have a look while waiting for my cooler. It doesn't look burnt out, but a few pins look a little different on 1 side.
 

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phillpower2

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Sep 9, 2016
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Did you try the PSU test that was suggested, if yes, what was the outcome, if no, try the test and post back with the results.

Not seeing anything wrong with the CPU but in the case of something getting shorted out there is not always a visible sign of damage.

In case you are not already aware 0kingskins0, MBs have thermal triggers that sense when a CPU is getting too hot and will immediately shutdown when the thermal limit has been reached, if a failed cooler was the issue here, the computer would at least try to power up when you pressed the case power button, it would shut down in a matter of seconds once the MB detected the high CPU temps and in the case of a MB that had an onboard BIOS error speaker a series of chirps would alert the user that there was a problem.

Under normal usage (no overclocking) the order of highest failure rates first = PSU - MB - RAM - GPU - CPU, the GPU and RAM failure rate is not a constant as having an appropriate quality brand PSU helps to protect the whole of the system while using an undepowered/poor quality PSU may allow a computer to run but it will damage the hardware in the process, an add on GPU being the most power hungry component will be the first and most affected component.