Computer wont post, no beeps, no display, all fans running except CPU fan.

Psyduck · Jul 12, 2013

Hi,

(I am not good with building computers etc so sorry if its something so obvious)

I just built my 2nd computer and seemed to be going ok. However when i tried turning it on it would not post, it didnt beep, and it would not display anything. All fans are working except for the CPU fan. I took out the CPU and resat it to see if that would help and it did not. The motherboard also displays the Q-code A2 (IDE Detect). I have also tried using only one stick or RAM and it did not help.

I don't have an optical drive in the computer yet as it has not arrived and the hard drive currently in the computer needs to be formatted as it still has an old OS and drivers on it. But i cant do any of that as i cant even get to the bios so i can choose what to boot from. I have also made sure everything is properly connected and unplugged and reconnected many times. Also on the motherboard the Boot Device LED is constantly red (is this because its trying to boot from a hard drive with the wrong drivers etc on? i don't even know).
The PSU and HDD are from my previous AMD based computer that was fully working.

System Specs are: ASUS Z87-PRO
Intel i7 4770k (with stock fan)
EVGA GTX 770 Superclocked 2GB
Corsair 16GB (2x8GB) DDR3 1600MHz Vengeance
Seagate 2TB BARRACUDA 3.5" SATA-III Hard Drive
Coolermaster GX 650W PSU
NZXT Phantom 410 Black Case

Thanks for any help you can give. If there is any other information needed I will do my best.

clutchc · Jul 12, 2013

Did you remember to plug in the 4/8 pin CPU power cable from PSU to MB?

Psyduck · Jul 13, 2013

clutchc :

I have plugged in the CPU fan cable seen in this picture here http://img.tomshardware.com/us/2006/05/10/dual_41_ghz_cores/intel_box_cooler.jpg into the CPU_Fan socket of the motherboard and also switched it to the CPU_OPT part to see if it made a difference. I have also plugged the 4/8pin connector direct from the PSU into the EATX12v socket. As well as having that huge 18/24 pin power cable plugged into the EATXPWR socket. The others cables are connected to powering fans and the GPU which both seem to work as well as the hdd.
Am i missing something somewhere? im pretty lost in this whole thing, this is the first time i have built a computer or done an upgrade where something went horribly wrong. Sorry if im not answering the question very well.

Thanks for any help

clutchc · Jul 13, 2013

It sounds like it should be able to boot to the POST screen fine. Maybe it is time to pull the board from the case and breadboard it. I always do that first to see if my new boards are defective (unfortunately, not uncommon). Another issue that can cause problems is if you inadvertently added a standoff where there is not suppose to be one. That may ground out the back of the board and keep it from booting.

Put the MB on an insulated surface like the shipping pad or box it came in. Then check inside the case for that stray standoff. While the board is out, connect PSU, CPU/cooler, RAM, and your monitor to the integrated gfx port. Leave the discrete card out for now. Don't connect any drives, etc. Using the on-board start button, see if the CPU/cooler fan spins and/or if you get a display. If no display, I would assume the MB is the issue. It is far more likely to be the culprit than the CPU.

Psyduck · Jul 13, 2013

clutchc :

I just did what you said and when powered on it still doesn't beep and the CPU fan still does not spin. However i can get to the bios now and it says CPU Fan Error along with the press F1 to enter setup. But as the CPU fan is not spinning the CPU starts to reach temperatures of 80c + within 30 seconds so i have to turn it off. The Q-code on the motherboard is now reading 99 (Super IO Initialization). So its still not fully working with the motherboard out of the chassis and the Graphics card/HDD and other disconnected as the CPU fan will not spin and i still get no beeps.
But i have already tried starting it without the Graphics card earlier while the motherboard was still in the chassis and i ran into the same problem of no beeps and CPU fan not starting. I have taken apart all components as well and rebuilt from scratch and still the same problems. I have also checked to see if there are any additional standoffs and there are not.
Still pretty confused and lost.
Thanks for the help and any other help you can give.

Update: I just tried plugging the CPU Fan into CPU_OPT instead of CPU_FAN and it twitched when the power button was pressed which didn't happen before. Then after I give the fan a few 'pushes' it starts spinning sometimes but very very loudly and at irregular speeds as well as still getting CPU Fan error on the display above press F1 to startup.

I then tried this same method but plugging back into CPU_FAN and it did not work at all, no twitch at power up and no amount of help would get the fan to spin. This obviously doesn't solve the issue but i'm just trying to give as much information as possible that may or may not be helpful.

clutchc · Jul 13, 2013

Try plugging the CPU cooler's fan into a SYS FAN header and see if the fan runs normally when you start the system.

Psyduck · Jul 13, 2013

clutchc :

I have looked for the heading of SYS FAN on the motherboard and cannot find it. The only headings to do with fans are CPU_FAN, CPU_OPT, and the chassis fans CHA_FAN1 - 2 - 3 - 4 etc. However i messed around with the wires of the cpus fan and now when i turn on the computer the cpu fan will start and go up to 1100 RPM on a stock fan (is that normal). The fan will still not start if I plug it into CPU_FAN, it only works if its in CPU_OPT and even then it still displays CPU FAN ERROR on the display. So there is still a problem and it doesnt seem very stable.

clutchc · Jul 13, 2013

As to the fan headers; some boards' manufacturers label them differently. The CHA FAN headers are the same as I was referring to with SYS FAN headers. Plug into one of those and let me know if the fan runs normally at start up. It may run at full speed or at a slower speed depending on how the BIOS setting is. We want to know if the fan is the issue or the board. Plugging it into another CPU FAN header may mean the board is the issue or the fan. But plugging it into the 3 pin sys/cha fan header will tell us if the fan motor is bad or not.

As to the fan RPM, I think that stock fan runs at a max of 3xxx RPM, so 1100 RPM would be a lower speed.

Psyduck · Jul 13, 2013

clutchc :

OK I just plugged the cpu fan into CHA_FAN3 as it i the only one within range. The cpu fan then started and behaved pretty much the same as when i plug it into CPU_OPT. By that i mean it starts and spins on power up, spins at around 1100 - 1300 RPM according to the BIOS, an I get a CPU Fan Error.

clutchc · Jul 13, 2013

I'm pretty sure you will have a fan error as long as you don't have a working fan plugged into CPU FAN. That's to be expected. But now we know the fan is working as expected. The problem, unfortunately, appears to be with the motherboard.

Psyduck · Jul 13, 2013

clutchc :

So no way to solve, the motherboard is faulty? So i should just contact the distributor or the manufacturer for a refund or replacement? Sorry im pretty bad at this what exactly do i say is wrong with it other than "its completely fucked".

Thanks for your help

clutchc · Jul 13, 2013

Since you are just returning a defective motherboard, simply state that the CPU fan will not run when plugged in to its header. But does work when plugged into a CHA FAN header, verifying that the fan is OK and the board is the problem. It shouldn't matter if you bought the components for your build online or from a local retailer. If they are reputable, they will not give you any problems. You can tell them you had a knowledgeable person assist you with the troubleshooting if they ask.

It's always depressing and frustrating to find a component of your new build is bad. I've been there more than once myself. Usually, it's been a MB.

Psyduck · Jul 13, 2013

clutchc :

Thank you for all your help. My non-stock fan should arrive on Monday. I'm going to try that out just to be 100% sure that it is the motherboard, even if its looking like 99.9999% right now. IF that doesnt work then I will close the thread and get a return on the motherboard. If by some miracle it does work i will update on the situation.

Once again thanks for your help.

clutchc · Jul 13, 2013

There is a small possibility that the problem is actually with the PWM feedback on the stock fan. I hadn't considered that until just now. When plugging it into the 3 pin header, the PWM system is out of the loop. So, that's a good idea to check with another 4 pin fan.

Psyduck · Jul 13, 2013

If i do end up having to return the motherboard, will they expect every single screw and piece of packaging to be sent back with it and all the correct screws in the correct packets etc?

clutchc · Jul 13, 2013

Psyduck :

They will definitely inspect it for any missing parts, yes. I don't know if they care if the parts are in their original packets, as I always do that anyway. From the URL in this post, I presume you are somewhere that uses the UK servers for this site. If you're not in the US, I can only comment on what I've experienced working with companies like Newegg and Amazon.

Psyduck · Jul 13, 2013

They will definitely inspect it for any missing parts, yes. I don't know if they care if the parts are in their original packets, as I always do that anyway. From the URL in this post, I presume you are somewhere that uses the UK servers for this site. If you're not in the US, I can only comment on what I've experienced working with companies like Newegg and Amazon.[/quotemsg]

Yeah im from the UK. Its just going to be a bit of a annoyance because its going to be hard to tell what screws came with the case and what screws with the motherboard as well as me using some of my own screws. But i'm still hoping that the new fan may solve some of the issues so i wont have to.

clutchc · Jul 13, 2013

The case usually comes with all of the screws, drive adapters, and PC speaker. The MB just comes with drive cables, I/O shield, and any CF/SLI bridge. Good luck.

Psyduck · Jul 17, 2013

clutchc :

I replaced the fan on Monday and everything seems to be running fine now for the past few days.

Thanks for all your help

Computer wont post, no beeps, no display, all fans running except CPU fan.

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