Changed PSU,when connected 24pin,no power

Solarstarshines said:

The Motherboard in question should atleast admit a beep of some sort when it has power
if there was no beep there is something wrong the connections are secure the next step he can try it in another rig

and see if he can get it started if not i would think the PSU doesn't have enough power and he needs to replace it with something that can

OK,if you would just read my previous posts instead of only reading the very last post,you would understand the predicament,and not suggest something that has been tried and testet.

Please understand, there is NOTHING wrong with the psu,the psu works on 2 other computers,it works when tested with multimeter. The psu in question does however NOT work with the gigabyte mainboard,which is why i am confused,as it should work fine unless mainboard is fried.

I can get psu fans and everything to spin if i short pin9 and a groundwire,but as soon as 4pin 12v atx and 24pin power is connected to mainboard nothing happens,not a single beep or anything

Dwarf said:

Have you tried bridging the ATX terminals whilst the connector is plugged in, as I described above? Another thing to try is to disconnect the reset switch from the front panel header, just in case there is a fault with it and it is constantly holding the motherboard's reset line to ground.

OK, this is beginning to freak me out. I pulled the mainboard (gigabyte),hooked it up to my brand new corsair 750GS,and mainboard lit up like a xmas tree,cpu fan began spinning,and so on,so mainboard works.

However, if i connect the same board to the northq psu,nothing again happens.

Now, if i bridge pin 9 and a black ground,i get psu fan spinning. If is use a multimeter and test the cables,i get 5v where 5v should be,i get 12v where 12v should be,i get -12v volt,i 3,5v , so why the hell doesnt this psu work with my gigabyte board?
I have no front cables attached,i tried to short the mb pins manually to simulate power button,nothing happens, but this worked on the corsair psu,so something is definitly wrong..

Also,if i connect the "faulty" psu back to the asus mainboard the asus work fine,you see why i am confused?
It is very strange.

*UPDATE*

AHA,i tried your suggestion with the bridge over green to black while connector is attached to mainboard,and it worked, motherboard lighted up,cpu fan began spinning,and fan on psu also spun.

So,what is wrong,and how can i fix it?

I have found that some power supplies just don't work with some motherboards. Good PSU.....good motherboard........but they just won't work together. It happens, and I wouldn't try to make it work, just put another psu on that motherboard and make sure you make a mental note about them not working together.

Sounds like a faulty plug on the PSU. Personally I've never heard of that brand and wouldn't use it. I would send it back and get one from the top 5 makers.

kbrady1979 said:

I have found that some power supplies just don't work with some motherboards. Good PSU.....good motherboard........but they just won't work together. It happens, and I wouldn't try to make it work, just put another psu on that motherboard and make sure you make a mental note about them not working together.

Really? That sounds kinda strange. This psu provides ALL the designed power to the correct connectors,so that makes no sense it shouldnt work, that is like saying it is the will of god,which i refuse to believe .. Anything has an explanation, you just have to look hard enough.

And by your logic,there is no guarentee a new psu would work anyhow,which is what standards are for,to make sure stuff fit together

bassfisher6522 said:

Sounds like a faulty plug on the PSU. Personally I've never heard of that brand and wouldn't use it. I would send it back and get one from the top 5 makers.

then why have this psu worked flawlessly with 2 asus boards?

But, something is clearly going on with this psu, i just would like to know what,and why

Dwarf said:

Tsunamijhoe said:

*UPDATE*

AHA,i tried your suggestion with the bridge over green to black while connector is attached to mainboard,and it worked, motherboard lighted up,cpu fan began spinning,and fan on psu also spun.

So,what is wrong,and how can i fix it?

I wonder if those terminals aren't making good contact with each other (that is, the PS_ON# terminal in the PSU connector and the corresponding pin in the motherboard socket. What happens if you try turning the computer on with the normal power switch whilst waggling the green wire?

I cant "jimmy" the start sequence,i have tried. i tried manually shorting the front header power switch connectors while fiddling with the 24pin connector,and every wire seperatly,i cant get it to start..

Should i just take this as a "loss" and throw this thing out,and buy a new one?

I am still curious though as to why this doesnt work

Tsunamijhoe said:

Solarstarshines said:

The Motherboard in question should atleast admit a beep of some sort when it has power
if there was no beep there is something wrong the connections are secure the next step he can try it in another rig

and see if he can get it started if not i would think the PSU doesn't have enough power and he needs to replace it with something that can

OK,if you would just read my previous posts instead of only reading the very last post,you would understand the predicament,and not suggest something that has been tried and testet.

Please understand, there is NOTHING wrong with the psu,the psu works on 2 other computers,it works when tested with multimeter. The psu in question does however NOT work with the gigabyte mainboard,which is why i am confused,as it should work fine unless mainboard is fried.

I can get psu fans and everything to spin if i short pin9 and a groundwire,but as soon as 4pin 12v atx and 24pin power is connected to mainboard nothing happens,not a single beep or anything

If you do not know if the mainboard is fried, I cannot understand why won't you test another PSU on the motherboard, NOT the PSU, test the motherboard with another PSU. I don't get why that is so hard to understand.

Erick Aguilar said:

Tsunamijhoe said:

Solarstarshines said:

The Motherboard in question should atleast admit a beep of some sort when it has power
if there was no beep there is something wrong the connections are secure the next step he can try it in another rig

and see if he can get it started if not i would think the PSU doesn't have enough power and he needs to replace it with something that can

OK,if you would just read my previous posts instead of only reading the very last post,you would understand the predicament,and not suggest something that has been tried and testet.

Please understand, there is NOTHING wrong with the psu,the psu works on 2 other computers,it works when tested with multimeter. The psu in question does however NOT work with the gigabyte mainboard,which is why i am confused,as it should work fine unless mainboard is fried.

I can get psu fans and everything to spin if i short pin9 and a groundwire,but as soon as 4pin 12v atx and 24pin power is connected to mainboard nothing happens,not a single beep or anything

If you do not know if the mainboard is fried, I cannot understand why won't you test another PSU on the motherboard, NOT the PSU, test the motherboard with another PSU. I don't get why that is so hard to understand.

I DID ALREADY,with my corsair GS700,mainboard works fine