Nothing happens when I hit the power button

Jamok23

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Dec 26, 2014
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Hey guys, so I'm having a problem with my computer. I have been building PCs for years so human error isn't much of a problem,but I won't rule it out.

So I decided to "upgrade" my case, from an h440 to an s340. Most people would see this as a downgrade, but the visuals appeal more to me than the h440.

I swapped all my components over and system booted up first time without any problems, but I noticed that one of the front fans wasn't spinning, so I took my back panel off and started looking around. I have the fan hub from the h440 in my s340 as my motherboard only has 3 fan headers and one is for cpu. So I have 4 fans hooked up to that, all of them have a 5v resistor wired in, just to tone the noise down.

I noticed that one of the wires on the resistor had come loose, so I pushed the wire back in, plugged it back into the fan huh and hit the power button....nothing. the psu made a single click like when the fans start, buthe that's it, no lights, no fans, nothing. So I removed the resistors on the front 2 fans and tried again, same thing, power supply clicks, then nothing. If Icypress the power button again then there is no click. It only clicks after I have turned my pc on at the wall and press the power button.

I have checked all connections and every thing seems fine, so it boils down to faulty motherboard, or faulty psu, (most likely the latter). Surely if it was the motherboard was fault, the lights and fans would still power on as they are connected to molex and completely separate from the motherboard.

So what do you guys think? My psu should still be under warranty, it's an evga 650w g2 gold, I only bought it in october. I don't have another power supply or motherboard to test anything :/

Thanks guys, and any help is appreciated.
 
Solution
I figured it out, either the fan hub, or the 3pin to molex adapter powering the fan hub shorted out, and wouldn't let anything switch on as there was a short circuit, so I removed the fan hub and adapter, and now everything works fine. Thank you for attempting to help me though
Ah you forget just like most things, if you have a good quality power supply.
It has voltage protection circuits in them.

Anything from a suspected short circuit to a power surge, or overvoltage, or under voltage.
Will trigger the circuit.

Turning it off at the wall socket does not clear the fault.

You have to turn the rocker switch to its off state on the power supply.
Unplug the socket from the wall.

Wait ten seconds. and plug it back in.
Then return the rocker switch back to it`s normal position.
To clear and reset and circuit protection that may of triggered on the power supply unit.

Then press your power button on the case Jamok23.
 
Hey buddy, thank you for your reply, unfortunately I have tried that, several times and several different ways, I even left it for about 30 minutes, still the same thing, I press the power button, the psu clicks but nothing happens :/
 
I figured it out, either the fan hub, or the 3pin to molex adapter powering the fan hub shorted out, and wouldn't let anything switch on as there was a short circuit, so I removed the fan hub and adapter, and now everything works fine. Thank you for attempting to help me though
 
Solution