Member Avatar for maple3

Okay, here we go...

what I ordered:

Case:

http://www.newegg.com/Product/Product.asp?Item=N82E16811208009


Processor:

Motherboard:

http://www.newegg.com/Product/Product.asp?Item=N82E16813131024

Video:

PSU:

Memory:

and I'm using an SATA drive.


Okay... Here's the story...

As you can see, I've pretty much ordered a new system to build, well... I installed everything down to the detail.. made sure motherboard was fully grounded, heatsink is locked in tightly (though I had huge problems with the heatsink attaching it to the processor.), switches plugged in correctly, jumpers left on default (read over motherboard manual many times to ensure no changes needed to boot.)

Okay, the issue... whenever I have all the hardware installed, I go to start the machine, well I turn the PSU on, and I get a green light on the motherboard. I press the power button, NOTHING happends, no fans, no lights, nothing... the only thing is the motherboard light.

So, which means the motherboard is getting power, but its not starting?

Okay, I thought the motherboard may be bad, ordered a new one, installed it... SAME THING!

I'm stuck, I even tried different PWRswitches from an another machine to confirm the case's switches werent bad, same results as before, nothing.


So my thinking is, can it be the motherboard? Obviouslly not with a new one tested and same result, PSU? The board's light is on, Processor? Wouldnt the PC still start (fans spinning or lights) without the processor? at this point, I'm clearly stumped... and very fraustrated of being unsure what to exactly do.

I keep thinking it could only be the case switches or psu, though I cant confirm the PSU because I dont have another PC.


Does anyone have any idea's?

I'm so desperate, I'll offer a reward to one to solve this or point me toward the right direction.


Thanks!!!

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  • Latest Post Latest Post by jbennet

Dani AI

Generated

Good work so far — the symptoms you described (motherboard LED on, nothing else when the front-panel power is pressed, and the same result after swapping the board and trying a different case switch) narrow this down usefully. and were on the right track: the next steps should isolate whether the power supply is failing or the motherboard is being shorted/held from powering on.

Try this minimal, ordered diagnostic:

  1. Breadboard the motherboard outside the case on a nonconductive surface with only CPU+cooler, one stick of RAM, and the PSU connected. Leave drives, cards and front-panel connectors disconnected. Short the two power pins on the front-panel header with a screwdriver to rule out the case switch.
  2. Verify the PSU can self-start: with the PSU unplugged from the motherboard, connect AC, then briefly short PS_ON (green wire on the ATX connector) to any ground (black) to force the supply on. If the PSU fan doesn’t spin, the PSU is bad. If it spins, measure rails (+3.3, +5, +12) or try a known-good PSU.
  3. Inspect for shorts: remove every motherboard standoff and reinstall only the ones under screw holes required by the board. Look for any stray screws, bent pins, or contact between the board and case that could short the 12V rail and prevent startup.
  4. Confirm the CPU power lead is actually present and fully seated (the separate 4-pin/8-pin CPU feed many boards require) and that the PSU’s voltage selector (if present) is correct for your region.

Safety note: only perform the PS_ON short while the PSU is on a nonconductive surface and avoid touching exposed connectors when AC is present. If the PSU fails the forced-start test or the board powers on outside the case but not inside, the problem is likely the PSU or a short between board and chassis — proceed to RMA or swap the PSU to verify.

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Member Avatar for zelkea

Hey Maple,
On your motherboard, do you have power going to both the 24-pin connector and the 4-pin located right next to it? I looked at your power supply and it does not appear to have a 4-pin connector. You should be able to pick up a 4-pin connector from any computer store. It should like the one in the picture here.

http://www.newegg.com/Product/ShowImage.asp?Image=17%2D104%2D015%2D15%2Ejpg%2C17%2D104%2D015%2D16%2Ejpg%2C17%2D104%2D015%2D17%2Ejpg%2C17%2D104%2D015%2D22%2Ejpg%2C17%2D104%2D015%2D23%2Ejpg%2C17%2D104%2D015%2D18%2Ejpg%2C17%2D104%2D015%2D20%2Ejpg%2C17%2D104%2D015%2D21%2Ejpg&CurImage=17%2D104%2D015%2D23%2Ejpg&Description=FSP+Group+%28Fortron+Source%29+FX700%2DGLN+ATX12V%2F+EPS12V+700W+All%2DIn%2DOne+Power+Supply+%2D+Retail

AJZ

Member Avatar for jbennet

Switch i either not connected properly to the psu / motherboard or your PSU isnt giving enough juice

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