Newly Built Computer Won't Power on, I have also referred to the no post, no boot, etc. help post

tigerluye · Dec 7, 2014

Hey everyone,
I recently put together a large build but when I got to power it on, not much really happens. I have the Corsair AX 760i power supply fully modular and the maximus VII formula mobo. Everything is plugged in (correctly I assume), but when I go to power on the rig, only the simple LED's (i.e., Republic of Gaming logo, start button backlight, reset button backlight, CMOS button on I/O, and even the MPCIe card used for the wifi will turn on. No fans, H100i, gpu, etc. It's also strange that when I press the power button on my CM Storm Trooper, no LED's light up, and again no power. I've done a self test on the power supply, checked the 8 pin CPU connect (don't believe anything is wrong), and have been trying to search the internet for any help.

I've attempted to power on the mobo with shorting the power pins, I'm using the onboard "Start" button, no beeps are heard from the installed tiny mobo speaker, and I've even tried using a different power cable for the 8 pin CPU connector.

Any questions are welcomed as well.

Any thoughts or ideas are so welcomed at this point. Thanks

alexoiu · Dec 7, 2014

Hi, Have you tested with motherboard outside the case for ruling out a short?

tigerluye · Dec 7, 2014

I haven't yet, although would the LED's still power on if there was a short?

alexoiu · Dec 7, 2014

Yes. If stll no CPU fan spinning outside the case, try the paperclip test for power supply.

tigerluye · Dec 7, 2014

Ive tried shorting the power pins together to turn it on, but I'll probably take some things apart if need be. Would appreciated your continued help and ideas. Could this problem come from the CPU? And another interesting thought, would the USB ports still be able to power such things as a mouse or keyboard even without it booting up?

alexoiu · Dec 7, 2014

CPU fan spinning is a sign that CPU gets power.
Try https://www.youtube.com/watch?v=5FWXgQSokF4
See if a fan connected to a PSU molex does spin.

tigerluye · Dec 7, 2014

Alright, I went and grabbed some thermal compound and cleaning supplies to disassemble and reassemble. An out of the case test failed again. RAM switching and all that jazz was also done. I'll definitely be trying your PSU check to rule that out once and for all, but it's looking like I may have to get a replacement mobo. Would that be correct? I don't believe it is the CPU at this point. I hope ASUS is pretty good about sending replacements if that is the case. I'll post back with the PSU test and keep looking for your thoughts.

Paul NZ · Dec 7, 2014

Look at the sticker under the barcode what are the last 4 numbers?

And whats the CPU?

tigerluye · Dec 7, 2014

The CPU is the Intel 4790K, and do you mean the 4 numbers for the Motherboard?

Paul NZ · Dec 7, 2014

Theres a sticker on the mobo what are the last 4 numbers under the barcode. This is the BIOS version thats on it now

The mobo needs BIOS 0501 on it to support that CPU

Core i7-4790K (4.0Ghz, 4C, HT, L3:8M, HD Graphic, 88W, rev.C0) ALL 0501

tigerluye · Dec 7, 2014

I'm not sure if this is the right number, but 0496? There are several barcodes and that was the only one that had numbers in bold. Is that the right one?

tigerluye · Dec 7, 2014

Wait so it could be the BIOS version? How would one go about updating the BIOS if he can't power it on? USB stick?

Paul NZ · Dec 7, 2014

Might be. But BIOS 0496 isnt on the ASUS site

But if 0496 is the BIOS you'll have to use USB BIOS flashback to flash the BIOS. It needs BIOS 0501

Download the latest BIOS extract it rename it to whatever the manual says under USB BIOS flashback. Then copy it to a flash drive

You'll have to read the manual on what USB port to plug it into and what button to press to flash the BIOS

tigerluye · Dec 7, 2014

Alright I'll get on that, and while I'm doing that, is there anywhere else I could've gotten that number? Possibly in the manual? online store page?

Paul NZ · Dec 7, 2014

No it'll be on the mobo the BIOS version on one of the stickers. Might be on the box

tigerluye · Dec 7, 2014

Alright. I checked in the manual about updating the BIOS, but all options kept referring to powering on the mobo for Ez mode, etc. etc., but I still can't turn anything on the mobo and get things working. Am I misreading something?

Paul NZ · Dec 7, 2014

You use USB BIOS flashback like what I posted. It'll be before the BIOS stuff in the manual

Thats the point of USB BIOS flashback, you can flash the BIOS if it doesnt turn on

Paul NZ · Dec 7, 2014

Its on page 2-15

tigerluye · Dec 7, 2014

Thanks, I'll check that out. I'm trying to double check the BIOS version. Looking at the board itself etc.

tigerluye · Dec 8, 2014

I just found the barcode that has the number. Says its 0501... so close

tigerluye · Dec 8, 2014

I went ahead and tried performing the flashback though. The flashback button never flashed like it was supposed to though. Nor did my flash drive light up to indicate activity. Could be a rough sign.

alexoiu · Dec 8, 2014

I guess it's a power supply issue, but not sure until you test it.

tigerluye · Dec 8, 2014

I just tested the psu and it performed absolutely perfect on the test and powered another fan and itself very quietly

Paul NZ · Dec 8, 2014

So the LED didnt flash on the mobo? If it didnt then something maybe faulty. If you did it the right way

tigerluye · Dec 8, 2014

Yeah it was a little strange. I did as the manual said by downloading the file and name it the certain way, put it in the correct slot, and nothing happened after pressing that button for three seconds. After all of this being tested and tried, is it pretty much certain now that the mobo is faulty?

Newly Built Computer Won't Power on, I have also referred to the no post, no boot, etc. help post

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