PSU has become damaged? LOUD humming noise

[Cat Daddy]

ok afew months ago i asked for help regarding a new psu as i was sure the pc was making an odd hum noise - i replaced this with a corsair 750w psu and i still heard this awful humming noise

Afew people recommended 750W Corsair RM750x for my replacement PSU as its meant to be fan-less mode and quiet

i installed the psu and noticed an improvment for awhile but today i switched my pc on and right off the bat somerts wrong - i hear this mega loud grinding noise and its not going away.....i know its the psu as i switched all my other fans off so unless a motherboard can produce a loud hum without any explanaintion (can it??) then i think my psu might have already crapped out on me. Its already started to make this awful grinding noise and i just cannot stand it.

Is this normal for this to happen because so far i seem to be having a crap-load of bad luck recently

[HEART]

coil whine is a possiblity. yes, a mb can produce it.

[Cat Daddy]

Автор сообщения: MiSOKA⁴

coil whine is a possiblity. yes, a mb can produce it.

SERIOUSLY? the motherboard can produce a loud noise like a fan grinding type of noise?

its just im finding it hard to believe its the psu because its worked fine for the past week and i highly doubt its the psu but if it isnt the psu and my other fans are switched off........could it actually be my motherboard making the fan-grinding type noise?

[Cat Daddy]

Автор сообщения: TheDude

Did you also disconnect the CPU fan? Not a good idea unless for a short time.

i have the small noctura cpu which has a fan on the front and the back.

i used the pencil trick for the back fan and held the front fan in the middle with my finger. the loud sound pretty much started once i switched the pc on and i has my back and side fans switched off

my gou is a 970 so the fans on that ONLY come on when i reach 60oc, they do come on when the pc starts but only for about 10 seconds (maybe less) but the pc itself makes this awful noise and now im really wondering if it could be the motherboard.............

[bill7932]

Have you tried using a paper tube as a stethoscope to find where the sound is coming from ?

[Morethan2Letters]

Disconnect the power supply from everything in the computer and jump out the 24 pin. See if it makes the grinding noise when you plug it into the wall and it turns on.

[Cat Daddy]

Автор сообщения: Advanced3

Disconnect the power supply from everything in the computer and jump out the 24 pin. See if it makes the grinding noise when you plug it into the wall and it turns on.

if i disconnect the 24 pic (from the motherboard) and everything else then the psu should only be connect via the plug into the wall socket and nothing else right?

so it shouldnt just....come on should it?........

[Morethan2Letters]

No it wont. You need to unplug from wall. Disconnect everything in the PC thats connected to the power supply. Jump out two pins in the 24 pin connector with a paper clip. Replug the PSU back into the wall and it will turn itself on. They also sell PSU jumpers already made, they're a good investment for a couple bucks if the paper clip method frightens you.

http://support.antec.com/support/solutions/articles/1000015319-is-my-power-supply-dead-the-paperclip-test

[Bad 💀 Motha]

Автор сообщения: Advanced3

No it wont. You need to unplug from wall. Disconnect everything in the PC thats connected to the power supply. Jump out two pins in the 24 pin connector with a paper clip. Replug the PSU back into the wall and it will turn itself on. They also sell PSU jumpers already made, they're a good investment for a couple bucks if the paper clip method frightens you.

http://support.antec.com/support/solutions/articles/1000015319-is-my-power-supply-dead-the-paperclip-test

LOL, modern PSUs usually come with this already included.
But yea, easy to do yourself, don't buy anything extra.
It's just a PSU power on test. It says nothing to whether or not the PSU lines all fully work or not.

[Morethan2Letters]

Автор сообщения: Bad_Motha

Автор сообщения: Advanced3

No it wont. You need to unplug from wall. Disconnect everything in the PC thats connected to the power supply. Jump out two pins in the 24 pin connector with a paper clip. Replug the PSU back into the wall and it will turn itself on. They also sell PSU jumpers already made, they're a good investment for a couple bucks if the paper clip method frightens you.

http://support.antec.com/support/solutions/articles/1000015319-is-my-power-supply-dead-the-paperclip-test

LOL, modern PSUs usually come with this already included.
But yea, easy to do yourself, don't buy anything extra.
It's just a PSU power on test. It says nothing to whether or not the PSU lines all fully work or not.

No doubt, but hes just trying to diagnose where a grinding noise is coming from at power up. Some people get a liittle sketched out wiith sticking a paper clip inside of a PSU pin and since he dosent have a Jumper I recommended that he purchase one.

[Bad 💀 Motha]

Simple, either a fan or hard drive... how hard is it to hear a sound and know where it comes from?

This is why we suggest the very simple paper-towl-roll-to-the-ear trick.
Doesn't get much easier than that.

[DefinitelyNotMonk]

any chance you could simply film your pc on startup and upload it to youtube so we can hear / see the pc and sound in question ?

[Cat Daddy]

Автор сообщения: DefinitelyNotMonk

any chance you could simply film your pc on startup and upload it to youtube so we can hear / see the pc and sound in question ?

i can try tomorrow if its any help. Ive never heard of this paper-clip trick but it sounds dangerious PLUS ive got a modular version of my psu....so disconnecting all the cables to take the psu out so i can try this paper clip trick would be a nightmare

[Morethan2Letters]

Автор сообщения: Cat Daddy

Автор сообщения: DefinitelyNotMonk

any chance you could simply film your pc on startup and upload it to youtube so we can hear / see the pc and sound in question ?

i can try tomorrow if its any help. Ive never heard of this paper-clip trick but it sounds dangerious PLUS ive got a modular version of my psu....so disconnecting all the cables to take the psu out so i can try this paper clip trick would be a nightmare

Just disconnect the cables at the PSU then, You dont have to remove your PSU from the case.

[Bad 💀 Motha]

Yes you could just disconnect all PSU cables from Motherboard and parts, then do the power on test with the PSU still inside the case. As should the PSU fan be the issue here, then it should be obvious after that PSU power on test w/ paper-clip trick. Just ensure that all PSU cables disconnected from all hardware, and that the ends of any power connector is in no way going to come in contact with anything metal.

You could even further test any CPU/Case fans you have one by one as well by using the PSU power on test and then try fans on that as well, using a 3pin to 4pin Molex adapter; even if a fan is 4pin PWM, it will still function on 3pins only still. Another good way to test and rule out any fan going up. As the grinding noise or sluggish starting of it would indicate it's going bad, as the bearings are worn out.

[Cat Daddy]

ok i took out the power supply and i turned it the other way around - ie the psu fan can now be seen inside the psu - so when i take the side panel off i can see what the psu fan is actually doing

now its meant to be silent and only spin at 60oc so 2 questions

1) if it doesnt stop spinning and the fan keeps contstantly spinning when its only meant to start at 60oc then does this mean the psu is broken or is it the motherboard that needs adjusting?

2) IF it is the motherboard running alot of power to the psu or telling it to start full wack and stay 100% then how do i fix this? ie how would i tell the mootherboard NOT to do this

i think the noise last night must have been the fan starting and not stopping. however i couldnt tell as the psu pointed downwards. now ive flipped it upwards i plan to watch the fan and see what it does