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Faulty power button?

By kentontator ·
I have a PC that will not turn on. The motherboard shows it is getting power (via LED light) but when I click the power button nothing happens, no fans start up, no posting or anything. I have replaced the PSU still nothing. I unplugged and removed all unnecessary components and still get nothing.

the only thing I can think of is a bad power button, is this plausible? Or does anyone have anything else I could try.

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All Answers

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Yes, it could be...

by cmiller5400 In reply to Faulty power button?

but you should be able to confirm that by simulating the press by quickly connecting the two pins that the power plug connects to. BECAREFUL...

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pins on the mobo?

by kentontator In reply to Yes, it could be...

pressing the two pins on the mobo together?

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quick fix....

by ---TK--- In reply to pins on the mobo?

take the power +/- connections and switch them with the reset +/- connections. Now your reset button is the power button, and your power button is your reset button... This is just a quick fix to test and see if its actually the physical button... Or you can leave it like that.. What ever works!

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by kentontator In reply to quick fix....

there is no reset button.

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I shouldn't say this but...

by ---TK--- In reply to sadly..

as last resort you could alway remove the +/- connections to the button, take a flat head screw driver and touch the + then quickly touch the - at the same time... Which will simulate the button push...

Or if you have time, you could do a motherboar swap (I would do this first, before the hack job).

**Note - I have never done this, and I have only have only "heard" about it! It is very VERY risky... But if I had no other choice, I would try it knowing that I could fry the board...

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Done it many times

by IC-IT In reply to I shouldn't say this but. ...

There is little if any risk.
It is a nice quick way to rule out the power button.

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by kentontator In reply to Done it many times

I will try this when I get home tonight and report back with findings. Thanks for the idea.

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by IC-IT In reply to pins on the mobo?

You may remove the proper jumper leads and briefly touch a conductive metal object to bridge the connection (as was indicated above this replicates the same action that the power button provides).
First though, you may want to id the leads and follow them to the front case cover to verify they haven't come loose.

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the leads look alright

by kentontator In reply to No

I actually wanted to take the power switch out and test it with another, but unfortunately the only other two computers I had at my disposal were older motherboards and had different connectors. Gonna try a flat head when i get home.

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by SPC_TCOL In reply to Faulty power button?

You can use an Ohm meter and measure if the powerswitch works when you press it.

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