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PC Power button wont do anything. New MOBO. Asus PB75-m. Green light is on on MOBO

Tags:
  • Power
  • Light
  • Boot
  • Green
  • Motherboards
  • Asus
Last response: in Motherboards
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February 15, 2014 2:22:11 PM

Ok guys, hello.. Im going nuts. First time building a PC.
I tried so many things and PC wont boot up. The green light is on but power button seems dead.
This Case was with my old PC motherboard, an ASUS m2n mx, with amd processor. Worked Fine. I wanted to keep the hard drive and case so I bought Asus PB75m with I3 3570k and New Ram DDR3 of course.
THe PSU works fine because it fires up the old system . Allready checked that. ITS the PSU that came with the case, its a generic 450w.
On the new motherboard I connect the ATX pin and the 24 pin. I connected of course the CPU, ITs correctly connected I double checked it 3 times before putting it. I followed all the instructions on the MotherBoards guide. I put in one Stick of 8gb Ram. and proceeded to connect the case usb speaker audio jacks etc. But the power button does not fire it up. Nothing moves, not even the PSU fan. Again its working fine, because it fires up the old system.

So i removed it to the bare minimum. CPU 24 pin and ATX pins which are four and power button. I tried flipping power button upside down, but Im positive im connecting it right since on the old mother board I can get it to work just fine.

At this point Im guessing either the PSU is incompatible with the mother board by god knows what reason or the case is incompatible. Or the MOBO is screwed which would be a shame since its new and I have to drive back to the place where they sent it from.... Anyhow, any Ideas? this tuesday IM gonna go to a friends and try to use his case and PSU... but I dont know..

More about : power button wont mobo asus pb75 green light mobo

a c 156 V Motherboard
a b Ĉ ASUS
February 15, 2014 2:34:45 PM

does the system work with the generic psu also did you plug in the reset switch .
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February 15, 2014 2:37:58 PM

scout_03 said:
does the system work with the generic psu also did you plug in the reset switch .



The old AMD system with older mobo works fine. I tried both with reset switch and without the reset switch on the new motherboard but it does not work. I also removed the MOBO from the case and tried it just to make sure it did not short circuit anywhere. But same result.
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a c 156 V Motherboard
a b Ĉ ASUS
February 15, 2014 2:39:08 PM

then it could be a do mobo ask for a rma .
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February 15, 2014 2:45:32 PM

scout_03 said:
then it could be a do mobo ask for a rma .


Yes, I guess ill be doing that. I mean, everything is connected fine... thanks

But if anyone has any ideas please tell me
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Best solution

February 24, 2014 6:07:40 AM

u say all is connected correctly yeah? what did u do with the fans?
i had this on older pc, the original i'd bought had a strange connection of wires in some sort of loop, and connected to the power cables and a 3 pin to the m/b..
when i put a new board in, i copied the old system..
no boot up but power lights were on m/b.. i knew it was something to do with the strange bundle of wires the fans had..
simply removed 3 pin from m/b and just plugged all fans into the main psu cable line.
fixed my issue

Or simply a case of making sure your power switch cable is the right way around? (sorry if it sounds daft,.. its easy done)
Your new m/b will have the diagram for power connections in the manual.. with the live/earth.. its normally with the cable connection writing facing outwards towards the case.
Does your new board or case need a different type of connecter?

Be careful what u doing with the power line.. u can blow things if volts are sent to the wrong area
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February 24, 2014 1:50:09 PM

Orbit48 said:
u say all is connected correctly yeah? what did u do with the fans?
i had this on older pc, the original i'd bought had a strange connection of wires in some sort of loop, and connected to the power cables and a 3 pin to the m/b..
when i put a new board in, i copied the old system..
no boot up but power lights were on m/b.. i knew it was something to do with the strange bundle of wires the fans had..
simply removed 3 pin from m/b and just plugged all fans into the main psu cable line.
fixed my issue

Or simply a case of making sure your power switch cable is the right way around? (sorry if it sounds daft,.. its easy done)
Your new m/b will have the diagram for power connections in the manual.. with the live/earth.. its normally with the cable connection writing facing outwards towards the case.
Does your new board or case need a different type of connecter?

Be careful what u doing with the power line.. u can blow things if volts are sent to the wrong area


I accidentally picked it as solution... but no. Connectors are the same, 24 pin, and 4 atx pin. I did not connect anything wrong. I checked manuals thoroughly. I mean I even tried bypassing the case by connecting the power pins with a paper clip just if this was the case. I tried then two different PSUs. Nothing. Im the process of RMA right now... Hopefully Ill get a new mother and check it out.
Thanks

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