Mobo will not power on | Linus Tech Tips | Page 1

brazen oriole Dec 20, 2022, 4:38 AM

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Currently building a new PC and wanted to test the parts before putting it all together. I have tried 4 different PSUs and none of them will power it on. The only one that DID power it on was the PSU in my current 9 year old build, which uses a Corsair RM750 (which is why I suspect it's not a mobo issue).

Motherboard: Gigabyte Z690 UD AX DDR4
CPU: 13900k
PSUs tried: 2x Corsair RM1000x and Super Flower Leadex SE Platinum 850w, EVGA SuperNOVA 1000 G5

I am absolutely baffled here. I've tried different outlets and also tried taking the RAM out. The only thing I did not try was powering on my current 9 year old PC with one of the new PSUs.

Why would a 9 year old RM750 work but nothing else?!?!

woven wave Dec 20, 2022, 4:40 AM

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You need to update the bios by the way for the 13900k support on a z690 board

brazen oriole Dec 20, 2022, 4:41 AM

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woven wave You need to update the bios by the way for the 13900k support on a z690 board

I do know this - but I can't even get the mobo to power on in order to Q flash

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Here's a picture of it powered on with the RM750. I do not get that red light when plugging in any other PSU

woven wave Dec 20, 2022, 4:42 AM

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brazen oriole I do know this - but I can't even get the mobo to power on in order to Q flash

Thats surprising that the other Two psus won't work

brazen oriole Dec 20, 2022, 4:42 AM

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woven wave Thats surprising that the other Two psus won't work

Three haha

woven wave Dec 20, 2022, 4:43 AM

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Sorry three but still

brazen oriole Dec 20, 2022, 4:43 AM

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brazen oriole

Also the red light lit up as soon as I powered on the PSU. Have not gotten any other PSU to light up the LEDs on the mobo

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Yeah I thought I got 2 bricked ones in a row from Corsair but the Super Flower 850w also won't power it on

woven wave Dec 20, 2022, 4:44 AM

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There was no led indicator when using the other psus?

brazen oriole Dec 20, 2022, 4:44 AM

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None. Shorting the pins to power it on also doesn't do anything

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Nor does the Q flash button which should light up an LED once pressed

woven wave Dec 20, 2022, 4:45 AM

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Shorting the pins wouldn't help until after you flashed the bios anyway

brazen oriole Dec 20, 2022, 4:45 AM

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Ah good to know

broken marsh Dec 20, 2022, 4:45 AM

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does shorting the psu pins turn the psu on?

woven wave Dec 20, 2022, 4:45 AM

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Like the paper clip test?

broken marsh Dec 20, 2022, 4:46 AM

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yea

brazen oriole Dec 20, 2022, 4:46 AM

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broken marsh does shorting the psu pins turn the psu on?

I tried the paper clip method on the Corsair 1000w PSUs and the fan does turn on after a slight delay

broken marsh Dec 20, 2022, 4:46 AM

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ahh

brazen oriole Dec 20, 2022, 4:46 AM

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Just absolutely bizarre that the only one that works is my 9 year old RM750w

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Is there some sort of compatibility issue I'm missing or something

woven wave Dec 20, 2022, 4:46 AM

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No

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If the corsairs and superflower are still within warranty I would absolutely rma them and get replacements

brazen oriole Dec 20, 2022, 4:48 AM

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woven wave If the corsairs and superflower are still within warranty I would absolutely rma...

I refuse to believe I got 3 bricked PSUs like how can that be

woven wave Dec 20, 2022, 4:48 AM

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Unless its just this board they don't like

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I would test the psus with another system

brazen oriole Dec 20, 2022, 4:49 AM

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Oh I also forgot I tried an EVGA 1000w PSU that also doesn't work. It has LED indicators on the PSU itself that indicate it's getting power. So that's 4 PSUs that don't work

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Yeah I was thinking that

woven wave Dec 20, 2022, 4:49 AM

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Because if they don't work with that system or the other then yes rma those

brazen oriole Dec 20, 2022, 4:49 AM

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But if it powers on the other system then what exactly is my issue? Because the mobo does power on with the 750w so I'm thinking it's not the mobo that's broken

broken marsh Dec 20, 2022, 4:49 AM

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ur using the cables that came with each psu right?

brazen oriole Dec 20, 2022, 4:50 AM

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Yes of course

broken marsh Dec 20, 2022, 4:50 AM

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haha just in case

brazen oriole Dec 20, 2022, 4:50 AM

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Haha I get it

woven wave Dec 20, 2022, 4:50 AM

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If it powers on the other system then either something wasn't plugged in correctly when you initially did it or they just don't like gigabyte lol

brazen oriole Dec 20, 2022, 4:51 AM

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Okay I'll give that a try tomorrow. It's an absolute pain to open up my PC rn and test that

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I'll let you know how it goes

woven wave Dec 20, 2022, 4:52 AM

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Yep 🙂

frank bay Dec 20, 2022, 5:43 AM

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are the cpu power cables connected?

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hard to see fi they are in the photo

woven wave Dec 20, 2022, 5:44 AM

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frank bay are the cpu power cables connected?

It wouldn't matter if the board isn't giving any indicator after the 24 pin is not plugged in

frank bay Dec 20, 2022, 5:44 AM

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wdym by any indicator

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the small red light at the bottom is on

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it doesent look like the board has any rgb too

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still want to keep those cables plugged in if possible to just rule out that being a possibility

woven wave Dec 20, 2022, 5:46 AM

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Yeah they used their 9 year old psu to get that indicator

frank bay Dec 20, 2022, 5:46 AM

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weird

woven wave Dec 20, 2022, 5:46 AM

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The other 3/4 they used didn't give that light

frank bay Dec 20, 2022, 5:47 AM

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they shorted the fpio?

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front panel connector?

woven wave Dec 20, 2022, 5:48 AM

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frank bay they shorted the fpio?

That wouldn't be applicable to see if they got board power because they still would need to update the bios to power it on and if the board has no power from the other psus how can they update?

frank bay Dec 20, 2022, 5:49 AM

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the boar would still power on just no post

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you cant update the bios with the board being off i believe

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it has to be on?

woven wave Dec 20, 2022, 5:50 AM

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You can't update a board that has no power to give any indication of life

frank bay Dec 20, 2022, 5:50 AM

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even using qflash or whatever

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ok but you cant tell if it has any life if you dont try and turn it on

woven wave Dec 20, 2022, 5:50 AM

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The led indicator

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Would tell you if the board is receiving some power

frank bay Dec 20, 2022, 5:51 AM

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not necessarily?

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not even sure what the led indicator is lol

woven wave Dec 20, 2022, 5:51 AM

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Could be an error light but it's at least something

frank bay Dec 20, 2022, 5:52 AM

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doesent matter lol just atleast plug in all the cables and try powering it no at a minimum lmfao

brazen oriole Dec 20, 2022, 5:52 AM

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Cpu is plugged in yes

woven wave Dec 20, 2022, 5:52 AM

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They probably did try all that lol

frank bay Dec 20, 2022, 5:53 AM

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brazen oriole Cpu is plugged in yes

when you turn it on it does nothing?

brazen oriole Dec 20, 2022, 5:53 AM

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I just tried plugging the super flower into my old pc and it is not powering on the mobo

brazen oriole Dec 20, 2022, 5:53 AM

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frank bay when you turn it on it does nothing?

Board gets no power

woven wave Dec 20, 2022, 5:53 AM

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If they went through the hassle of trying 4 different psus and the 5th one worked something is wrong with the others

frank bay Dec 20, 2022, 5:53 AM

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yeah either that or your motherbaord is bricked

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lmfao

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theres no way you have 4 broken power supply's

brazen oriole Dec 20, 2022, 5:54 AM

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That's what I'm saying lol

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But everything points to that

woven wave Dec 20, 2022, 5:54 AM

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However unlikely it is something is wrong

frank bay Dec 20, 2022, 5:54 AM

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do you have a known working one?

brazen oriole Dec 20, 2022, 5:54 AM

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Like this 850w isn't even powering on my old pc

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Yes

frank bay Dec 20, 2022, 5:54 AM

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unlikely is more like impossible lmao

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did you try the known working one?

brazen oriole Dec 20, 2022, 5:54 AM

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My 9 year old pcs psu powers it on

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Only one that worked

frank bay Dec 20, 2022, 5:55 AM

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then just use that for now and return all the other ones

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thats weird

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where are you buying these psu's lmao

brazen oriole Dec 20, 2022, 5:55 AM

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I have a 13900k but also I need this pc currently lol

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Amazon

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Sf from Newegg

frank bay Dec 20, 2022, 5:55 AM

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and you bought 4 power supplies from them?

woven wave Dec 20, 2022, 5:56 AM

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Time to rma those 4 back to whence they came

frank bay Dec 20, 2022, 5:56 AM

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no need to rma unless amazon/newegg return period is over

brazen oriole Dec 20, 2022, 5:56 AM

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One replacement, 1 ordered by mistake, 1 new one which I just got

frank bay Dec 20, 2022, 5:56 AM

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rma's take forever lmao

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have you tried the new ones on your old computer?

brazen oriole Dec 20, 2022, 5:57 AM

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I have the super flower plugged in rn and no power

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Can't really see shit but yeah

frank bay Dec 20, 2022, 5:57 AM

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ive nver heard of that rband lol

woven wave Dec 20, 2022, 5:57 AM

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Please tell me this is one of those times you did flipped the switch on the back of the psu lol

frank bay Dec 20, 2022, 5:57 AM

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OH YEAH

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LMAO

brazen oriole Dec 20, 2022, 5:57 AM

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Guys please

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Lmao

frank bay Dec 20, 2022, 5:57 AM

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try it just in case

brazen oriole Dec 20, 2022, 5:58 AM

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The psu literally has an led to indicate on

frank bay Dec 20, 2022, 5:58 AM

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who knows

brazen oriole Dec 20, 2022, 5:58 AM

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Gonna try the evga on my old pc rn

frank bay Dec 20, 2022, 5:58 AM

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alr

brazen oriole Dec 20, 2022, 6:03 AM

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No power from evga either

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What is going on lmao

frank bay Dec 20, 2022, 6:03 AM

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maybe your new computer is bricking all your powersupplies

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lol

woven wave Dec 20, 2022, 6:03 AM

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Doubt it

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Why didn't it brick the 9 year old psu

brazen oriole Dec 20, 2022, 6:04 AM

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I would test the 9 year old again but it's an absolute pain

frank bay Dec 20, 2022, 6:06 AM

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just buy a new powersupply, test it in your old computer first and then try it in the new one

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also have you tried updating the bios with your old powersupply?

brazen oriole Dec 20, 2022, 6:08 AM

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frank bay also have you tried updating the bios with your old powersupply?

No I didn't

frank bay Dec 20, 2022, 6:08 AM

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just do that

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hmmm

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is that the only known working powersupply you have?

brazen oriole Dec 20, 2022, 6:08 AM

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Would there be a reason for the new psus to not power it on until the bios is updated

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Yes

frank bay Dec 20, 2022, 6:09 AM

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no there shouldnt be any reason any of them arent working

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dang

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have you atleast tried the power switch

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lmao

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powersupply power switch i mean

brazen oriole Dec 20, 2022, 6:10 AM

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frank bay Dec 20, 2022, 6:10 AM

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i feel like the only way you would ahve so many nonfunctioning power supplies is user error

brazen oriole Dec 20, 2022, 6:10 AM

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Green led on psu

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Ik

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But nothing makes sense

frank bay Dec 20, 2022, 6:11 AM

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and flipping the switch turns the light off?

brazen oriole Dec 20, 2022, 6:11 AM

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The new mobo frying my psus I hadn't thought about but my 750w is still alive

frank bay Dec 20, 2022, 6:11 AM

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weird motherboard screw lol

brazen oriole Dec 20, 2022, 6:11 AM

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frank bay and flipping the switch turns the light off?

Yes

frank bay Dec 20, 2022, 6:11 AM

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damn

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and you tried the evga on the new one?

brazen oriole Dec 20, 2022, 6:11 AM

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Evga and super flower

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Oh the new one

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Yes all psus have been tried on the new one

frank bay Dec 20, 2022, 6:11 AM

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have you tried a different outlet

brazen oriole Dec 20, 2022, 6:11 AM

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Yes

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Direct to wall and power strip

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Both working outlets that I use every day

woven wave Dec 20, 2022, 6:12 AM

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You do realize the evga 24 pin is not plugged into the board right?

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You still have the rm750 psu plugged into it lol

brazen oriole Dec 20, 2022, 6:13 AM

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No the one on the right is the 750

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Idk guys it's gotta be something I'm doing wrong but I've run out of ideas on what it could be

frank bay Dec 20, 2022, 6:17 AM

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woven wave You still have the rm750 psu plugged into it lol

you can tell becasue of how much dust is on there

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why do you need your old computer?

woven wave Dec 20, 2022, 6:17 AM

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Well for situations like this apparently lol

brazen oriole Dec 20, 2022, 6:18 AM

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I wfh and I need to be sure I have a computer working. Also don't think the 750w can support the 13900k

frank bay Dec 20, 2022, 6:18 AM

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what gpu do you have?

brazen oriole Dec 20, 2022, 6:19 AM

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Gtx 770 lol

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Upgrading to 3090

frank bay Dec 20, 2022, 6:19 AM

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in the new or old computer

woven wave Dec 20, 2022, 6:19 AM

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Oh yeah definitely not

brazen oriole Dec 20, 2022, 6:19 AM

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Old pc has the 770 lol

frank bay Dec 20, 2022, 6:19 AM

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new one has the 3090?

brazen oriole Dec 20, 2022, 6:19 AM

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Yes but it's not built

frank bay Dec 20, 2022, 6:19 AM

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hmmm

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you might be able to run it but you'd really be pushing it

brazen oriole Dec 20, 2022, 6:20 AM

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Gotta be a mobo issue

woven wave Dec 20, 2022, 6:20 AM

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Doubt it

frank bay Dec 20, 2022, 6:20 AM

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this is looking like a psu issue tbh

woven wave Dec 20, 2022, 6:20 AM

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I would use at least an 850 with a 3090

brazen oriole Dec 20, 2022, 6:21 AM

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Yeah don't really wanna risk it

frank bay Dec 20, 2022, 6:21 AM

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tdp of both componets adds up to about 600w

woven wave Dec 20, 2022, 6:21 AM

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Especially if it's a 9 year old psu

brazen oriole Dec 20, 2022, 6:21 AM

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How can 4 not work though what else could I be doing wrong lol

frank bay Dec 20, 2022, 6:21 AM

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it being 9 years old doesent matter

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kinda

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but not really

woven wave Dec 20, 2022, 6:22 AM

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No but the components are aging they probably don't have good ocp

frank bay Dec 20, 2022, 6:22 AM

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if i were you i would just take the drives out of my old computer, plug them into my new one and just not do anything too demanding

woven wave Dec 20, 2022, 6:22 AM

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That psu looks like a 2012 model

brazen oriole Dec 20, 2022, 6:22 AM

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Why would I do that when I can just use my old pc

frank bay Dec 20, 2022, 6:22 AM

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thats a really good question

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lmfao

brazen oriole Dec 20, 2022, 6:22 AM

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woven wave That psu looks like a 2012 model

Built in 2013 so probably right

frank bay Dec 20, 2022, 6:23 AM

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yeah idk i would honestly go to a brick and mortar store and buy a psu there

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take it home and test it and see if ti works

brazen oriole Dec 20, 2022, 6:23 AM

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Was thinking about just taking it to microcenter and having them figure it out, I've exhausted every option

frank bay Dec 20, 2022, 6:23 AM

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yeah that sounds like a great idea

brazen oriole Dec 20, 2022, 6:23 AM

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Never seen this before

frank bay Dec 20, 2022, 6:24 AM

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yea this is super weird lol

woven wave Dec 20, 2022, 6:24 AM

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Lol microcenter and then they charge you an arm and a leg

frank bay Dec 20, 2022, 6:24 AM

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i would first get started on returning your other psu's you bought

brazen oriole Dec 20, 2022, 6:24 AM

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woven wave Lol microcenter and then they charge you an arm and a leg

I know that's why I was really trying to avoid it lol

frank bay Dec 20, 2022, 6:24 AM

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i thought microcenter was relatively cheaper?

brazen oriole Dec 20, 2022, 6:24 AM

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I think my friend said 75 to build it but with testing maybe more idk

woven wave Dec 20, 2022, 6:24 AM

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It depends on the microcenter or they might just claim fraud and kick you out who knows

frank bay Dec 20, 2022, 6:24 AM

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it wouldnt be building just diagnosing

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also 75 isnt that bad lol

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considering all the time you've spend and the psu's youve bought i woudlnt say 75 is a bad deal

brazen oriole Dec 20, 2022, 6:25 AM

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75 to build isn't terrible yeah especially with the point I've reached

frank bay Dec 20, 2022, 6:25 AM

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yeah lol

woven wave Dec 20, 2022, 6:25 AM

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75 to build is not the same as testing

frank bay Dec 20, 2022, 6:26 AM

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yeah but when they build they have to giv eoyu something back that works

woven wave Dec 20, 2022, 6:26 AM

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Because it could take more man hours to get the psus to be successful

frank bay Dec 20, 2022, 6:26 AM

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which means if it doeseent work for them they will have to test it and they shouldnt charge extra for that

woven wave Dec 20, 2022, 6:26 AM

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If its completely brand new they could just swap out a part on the spot

frank bay Dec 20, 2022, 6:26 AM

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idk i would just return ur stuff first and go to microcenter and buy a psu there

woven wave Dec 20, 2022, 6:26 AM

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But since the psus weren't bought at microcenter that could pose an issue

frank bay Dec 20, 2022, 6:27 AM

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wait why lol

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you're testing the computer not the powersupplies

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you bring the computer to microcenter not the psu's lol

woven wave Dec 20, 2022, 6:27 AM

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Clav because we know one psu works

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The others don't

frank bay Dec 20, 2022, 6:27 AM

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uh huh

brazen oriole Dec 20, 2022, 6:28 AM

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Should I try flashing the bios with the 750w

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Would that have any chance of working lol

woven wave Dec 20, 2022, 6:28 AM

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You could at least do that

frank bay Dec 20, 2022, 6:28 AM

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yeah but that shouldnt make a difference with the powersupplies

woven wave Dec 20, 2022, 6:28 AM

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Not but he could at least see if the system will post

brazen oriole Dec 20, 2022, 6:28 AM

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Might make the mobo not returnable? It's Amazon tho they'll take back everything

frank bay Dec 20, 2022, 6:28 AM

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nah it wont affect that

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lol yeah amazon dgaf

woven wave Dec 20, 2022, 6:29 AM

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Since it's a 13600k they can use the igpu to see if it gets to bios

frank bay Dec 20, 2022, 6:29 AM

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yuh

woven wave Dec 20, 2022, 6:29 AM

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No need for a gpu in this scenario

brazen oriole Dec 20, 2022, 6:29 AM

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Alright gonna plug the 750w in this might take awhile

woven wave Dec 20, 2022, 6:29 AM

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For the time being

frank bay Dec 20, 2022, 6:29 AM

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alr lol

brazen oriole Dec 20, 2022, 6:29 AM

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Annoying with the cables in the case

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Ok we have a development

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The 750 is now not powering on the new mobo

woven wave Dec 20, 2022, 6:37 AM

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Uh oh

brazen oriole Dec 20, 2022, 6:38 AM

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Everything is plugged in correctly and switch is on

woven wave Dec 20, 2022, 6:38 AM

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The gigabyte board is Thanos its snapping psus out of existence

brazen oriole Dec 20, 2022, 6:39 AM

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Ima plug it back into my old pc now this shit better work

woven wave Dec 20, 2022, 6:39 AM

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If it doesn't then we know the culprit

brazen oriole Dec 20, 2022, 6:40 AM

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That's some good news I guess lmao

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Bad news is I will have no pc

woven wave Dec 20, 2022, 6:40 AM

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Gigabyte you have some explaining to do

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They should be offering you money back and then some

frank bay Dec 20, 2022, 6:41 AM

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that would be insane if the motherbaord is actually bricking powersupplies

woven wave Dec 20, 2022, 6:41 AM

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Its gigabyte I wouldn't put anything past them

brazen oriole Dec 20, 2022, 6:42 AM

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Old pc still boots

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Unbelievable

woven wave Dec 20, 2022, 6:42 AM

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Ok good

brazen oriole Dec 20, 2022, 6:42 AM

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Why did it power on the mobo the other time tho lmao

woven wave Dec 20, 2022, 6:43 AM

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So its just 4 power supplies that suck

brazen oriole Dec 20, 2022, 6:43 AM

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It can't be

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I refuse to believe that

woven wave Dec 20, 2022, 6:43 AM

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You made sure to keep the cables not mixed right

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Like you didn't accidentally plug a corsair 24 pin into the superflower psu

brazen oriole Dec 20, 2022, 6:44 AM

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Yes been very careful about that

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One of the corsair actually had a fucked 24 pin that was like misaligned and wouldn't fit so I just used the other 24 pin from the other corsair psu

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But never mixing anything else

woven wave Dec 20, 2022, 6:46 AM

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Ok what models of psu do you have?

brazen oriole Dec 20, 2022, 6:48 AM

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Check my first post, I have them listed there

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The 9 year old is rm750

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Corsair

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Wouldn't it be a mobo issue if the 750w isn't working anymore?

woven wave Dec 20, 2022, 6:50 AM

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No we ruled out mobo issue

brazen oriole Dec 20, 2022, 6:50 AM

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I thought that was because it powered on with the 750w before

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Now it's not

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Oh but none of the new PSUs work in my old pc either I guess lol

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This is so fucked nothing makes sense

woven wave Dec 20, 2022, 6:53 AM

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Left is right right is up down is left and up is down

brazen oriole Dec 20, 2022, 6:53 AM

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I appreciate your help big time brother

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We will figure it out

woven wave Dec 20, 2022, 6:54 AM

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Yeah sounds like a gamers nexus video or a Linus tech tips video or a jayztwocents video

brazen oriole Dec 20, 2022, 6:54 AM

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I give Linus permission to use my situation as a video in true crime format

woven wave Dec 20, 2022, 6:55 AM

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Honestly it definitely sounds like something he would do especially now that they have the psu tester machinery

brazen oriole Dec 20, 2022, 6:58 AM

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I give up for today

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Got work in the morning lol

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Will revisit tomorrow

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Thanks for everyone's help

frank bay Dec 20, 2022, 4:14 PM

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i would just bring everything to micro center lmao

brazen oriole Dec 20, 2022, 8:04 PM

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Buddy of mine has a PSU tester. Gonna bring stuff over there later and will report back

#Mobo will not power on