How do I power on a computer with out the power button assem

Biostar / G31d-m7 lga 775 intel g31...
January 30, 2012 at 19:07:43
Specs: Windows 7, unknowm/4gig
I have a power button assembly that I believe is shorting. It is sending shutdown/powerup commands at random.. (it literally turns itself on.. creepy) Anyways I want to see if the computer is otherwise undamaged, Can I bridge the + and - pin where the power switch connects to the motherboard to power a computer on?

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#1
January 30, 2012 at 19:45:32
It's unlikely the switch is bad. A computer power button is a momentary switch, similar to a doorbell button - press & release. The contacts are NOT supposed to be bridged. However, if you unplug the switch from the board, you should be able to power up the system by momentarily shorting the 2 pins with a screwdriver blade. Or if your case has a reset button, unplug the power switch cable & plug the reset button cable in it's place, then use the reset button to power up the system.

What makes you think the switch is your problem?


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#2
January 30, 2012 at 19:54:33
A small amount of water got into the power switch. It is a atx full tower and the power button and a set of usb plugs is all that was in the area that got dripped on. Computer is fully functioning (bench tested and then added components one at a time) but now I notice that it shuts down and turns on at random. I checked the windows event logs for errors related to the shutdown and there were none... thus I determined that the switch is the issue. Toi test my hypothesis I want to unplug every part in the general vacinity of the drip and bench test that, however that means I have no power, thus my question, can I bridge for a moment the two contacts o n the motherboard with a screwdriver to power it on or will it damage things?

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#3
January 30, 2012 at 21:19:57
Like I said, the power button is a "momentary switch". When the button is pressed (& released), it makes momentary contact to complete the "power on" circuit, then returns to the open position at which point it is no longer a part of the electrical equation. It's extremely unlikely the power button is the problem.

http://case-mods.linear1.org/case-m...


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#4
January 30, 2012 at 21:22:05
Well what I have done is take the suggestion of rewiring the reset switch to the power and it now works fine. Thanks so much!

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#5
January 30, 2012 at 22:23:50
The power switch can be used to force a shutdown by holding in the switch for 3 to 5 seconds.

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