New build won't boot, help needed

ne0

ne0

ne0

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2 Feb 2018
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Hi all

One day I'll build a pc that boots first time *sigh*...

Ok so I've finished a new build into a Corsair 5000x - all went fine although hooking up the fans was a bit of a head scratcher and I still don't know if I've done that correctly (I doubt that would be the cause of my problem though). Tried turning on for first time and the following happened:

motherboard lights up
CPU pump display lights up with a red triangle and exclamation mark indicating something is wrong.
Pressing the power button on the case results in a single beep and literally nothing else - no fans spinning.

Last time I built a pc I had a similar issue and it turned out to be a bent cpu pin which I managed to fix and had no problems after that. So I checked the cpu and it all looks perfectly fine.

The ram, gpu and psu are all components which I harvested from my previous build so I know they're decent.

The motherboard is a z690 Asus wifi.
cpu is Intel i7 12700kf

The cpu cooler is a Corsair h510 elite AIO.

I've checked and double checked all the connections.

Any help hugely appreciated as I'm completely stumped.
 
Motherboard LEDs not lighting up although the RGB on the motherboard lights up.

Checked the motherboard screws, they're the right ones.

Going to try alternate usb 2 headers
 
Checked the CPU socket again VERY carefully, with a torch, zoomed in on my phone etc for ages. There's nothing wrong with it.

Checked the instruction manual for the mb and realised I hadn't removed the little cover from the lever to seat the CPU; sorted that and still the same problem.

Haven't tried other usb2 connections yet but getting worried now.
 
VersionMonkey said:
If the AIO is not happy it is presumably not providing an RPM signal to the CPU fan header. Maybe the board is refusing to boot for that reason?

Try connecting an ordinary PWM fan to the CPU header? If the AIO isn't running, though, you don't want the PC to be on for long if it does boot.
Click to expand...

Just checked the ram and all good there.

Everything is pointing towards the CPU, aio or motherboard.

I did try moving the aio fan from the main CPU header to the aio pump header but that didn't make a difference.

Can you explain what you mean re. the pwm cable? I have the aio cable going in to the CPU fan header and also the pwm cable going from the case's fan module to another pwm fan header on the motherboard.

Literally out of ideas ☹️
 
I found one thing I did wrong which was put the front panel power cable the wrong way round (+/-) - sorted that but only difference is I can now make it beep more than once when I press the on button... So not much help but at least that button will now work properly.

I think I understand what you mean re. testing with another pwm fan on the CPU fan header. If it does boot I'll immediately power down and then blame the aio - I think that's what you're advising.

Here's a pic of what I'm facing, just the 2 light indications and an awkward "beep" when I press the power button:


https://imgur.com/a/e0zjmnX

Not sure how to embed the image sorry
 
Gimpymoo said:
Mainboard stand-offs installed in the right places?

Not a random one causing a short?
Click to expand...
The case already had standoffs so wasn't necessary. There's a good gap behind it so I think it's ok.

Just tried putting another 4 pin fan into the CPU header and got the exact same issue which I guess means it's not the aio??. I'm starting to think I'm looking at a bad mobo but really don't know.

There are no fans spinning which I find really odd. I have hooked up 10 fans of which only 3 are attached to the aio so why would the rest not even get power?
 
mickyflinn said:
@ne0 looking at your photo of your motherboard is the cpu power cable in the correct connector ?

Normally it's the power connecter closet to the cpu socket .
Click to expand...

Yeah the one it's in is marked "cpu fan". I tried the one labelled CPU "other" but got same result.

I also tried the aio pump header but same result. There is another header next to that, will try that.
 
Btw can someone explain to me why none of the 10 fans are spinning taking into account the other symptoms. I guess I would at least expect them to get power.
 
ne0 said:
Yeah the one it's in is marked "cpu fan". I tried the one labelled CPU "other" but got same result.

I also tried the aio pump header but same result. There is another header next to that, will try that.
Click to expand...

Yeah tried that one too but no result.
 
VersionMonkey said:
No, he means the 8-pin power connector that goes to the top of the motherboard.



Not sure - how are they connected?
Click to expand...

For power they're all connected to a single SATA cable from the PSU (SATA cable issue?!). I have a pwm controller which came with the case, plus a commander pro hub which can with the aio and its 3 fans. I can't understand why the fans don't even spin.
 
Sorry if nooby question but why take the mobo out of the case?

By minimal build I guess you mean just mobo, CPU, no fans apart from aio fans? . Disconnect the front panel headers too?

Also how common is a faulty mobo? My gut is telling me it's that (PSU is a known good component) but the mobo is brand new. The fact that even the fans aren't getting power and swapping out the pwm cables didn't even change anything is making me think the mobo is just defective. If the aio was defective (it's also new) I guess the other fans would still show some life and the pc would at least try to boot and then shut down?
 
Btw I googled about the warning symbol on the aio lcd but could only find peeps who saw this using icue so seems theirs was a software problem. I guess it's a generic indication of an error.
 
One more thing I should add. It's just occurred to me that the mobo RGB and aio symbol you can see in the picture both turn on by me simply plugging the PSU into the wall - this is before I've even pressed the power button on the case (doing that gives me the "beep"). How the heck is the PSU supplying power without me even powering on via the case button?!

/Edit nevermind I think it's an Asus thing, red herring.
 
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mickyflinn said:
To rule out any short.

A lot of people build a minimal pc before putting into a case to check it works.
Click to expand...

Ah ok yeah that makes sense. Should I rest it on a piece of cardboard? I think I'll try this tomorrow and then go from there.

Big thanks for all the replies and help so far.
 
mickyflinn said:
Yes or a wooden table/board but don't pit it on the anything conductive . You will have to jump the power on connector on the motherboard once all parts have been connected.

Minimal parts build.
Click to expand...
Ok thanks. I've watched a few vids; gonna jump it with a screw driver. Pain in the back side this but positive is I'm learning something new.
 
mickyflinn said:
If no luck then you need to test the psu you can do this with the paperclip test. Most psu fans don't run until a certain load so you would need to attach a fan to one of the psu connectors.

What psu do you have ?

Click to expand...

I won't rule the PSU out but I'm least suspicious of it as it was working perfectly in my previous build which I've just taken it from. It's a Silverstone 850w 80+ platinum.

Been doing some more reading and a couple of posts on the Asus forums mention no q-leds on the motherboard usually means either PSU or motherboard is to blame.
 
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