System powers off and on when pressing power button

[kyrcy]

I think I can distinguish the difference between the power and the reset buttons.

Okay, maybe the power and reset buttons are not connected to the motherboard correctly, so that pressing "Power" activates "Reset."

Take a look at post #15 again - the "PW" and "RES" connections are small and located close together; a mistake could easily have been made.

Maybe power button not working properly
try test by disconnect all USB, LAN cable, mouse, keyboard ...
only power connected to power supply
remove connector of power button the POWER SW from motherboard:


Now short POWER pins on motherboard with screwdriver to power on/down
same problem?

The connectors are in the correct locations. If I short the power pins with a screwdriver the system powers off normally. Does this mean that the problem is with the power button? Should I look for a new case?

[jan5678]

If you short the power button pins does the pc shuts down after a few seconds and stays off?
Then yes the problem lies in the power button.
You don't have to buy a new case, the power button switch can be replaced quit easily

[kyrcy]

If you short the power button pins does the pc shuts down after a few seconds and stays off?
Then yes the problem lies in the power button.
You don't have to buy a new case, the power button switch can be replaced quit easily

How easily can it replaced as finding the same switch could be difficult?

[jan5678]

Any store that sells electronic components will have such a switch.
You must be a little bit handy to do this, and possibly use a soldering iron, but if you are not familiar with that you always could buy a new case.

I mostly use scrap parts from old pc's.

Sometimes you can use the reset switch as power button, maybe you could swap them. i never use the reset switch anyway haha

Edit: you can test if the power button switch really is broken by switching the reset and power button wires on your motherboard. The reset button will be the power button then. if it operates normal like it should, the power button switch is broken.

[usually_quiet]

If you short the power button pins does the pc shuts down after a few seconds and stays off?
Then yes the problem lies in the power button.
You don't have to buy a new case, the power button switch can be replaced quit easily

How easily can it replaced as finding the same switch could be difficult?

If you only need to replace the switch, but there are no nearby stores handling them, they are sold on Amazon, ebay, and probably many other Internet retailers.

https://www.amazon.com/uxcell-Computer-Power-Supply-Switch/dp/B00H8Q0978/

[kyrcy]

If you short the power button pins does the pc shuts down after a few seconds and stays off?
Then yes the problem lies in the power button.
You don't have to buy a new case, the power button switch can be replaced quit easily

How easily can it replaced as finding the same switch could be difficult?

If you only need to replace the switch there are no nearby stores handling them, they are sold on Amazon, ebay, and probably many other Internet retailers.

https://www.amazon.com/uxcell-Computer-Power-Supply-Switch/dp/B00H8Q0978/

The above switch seems like what I need but I will first look in some local shops selling electronic components.

[usually_quiet]

If you short the power button pins does the pc shuts down after a few seconds and stays off?
Then yes the problem lies in the power button.
You don't have to buy a new case, the power button switch can be replaced quit easily

How easily can it replaced as finding the same switch could be difficult?

If you only need to replace the switch there are no nearby stores handling them, they are sold on Amazon, ebay, and probably many other Internet retailers.

https://www.amazon.com/uxcell-Computer-Power-Supply-Switch/dp/B00H8Q0978/

The above switch seems like what I need but I will first look in some local shops selling electronic components.

There was a typo in my original post. I don't know whether it was my wireless keyboard or me at fault.

[cornemuse]

The pwr & reset switches are basically all identical for 99% of computers (well maybe only 90%) only diff being length of the leads & printing on plug end. Now from oold machines with 'turbo' switches, those are different in that they stay either on or off, while power & reset sw's are momentary on, ie till you release them. They look the same but the turbo sw's stay 'in' when on & 'out' when off, like maybe a sixteenth of an inch. Pay attention!! Dont use them!!

I cut a section from the '24 pin socket' from a junk mobo which matches the green & one of the black wires on a psu 24 pin plug, (cut a section inc. 6 pins, removed all but one black & the green, green = mobo tells psu to come on or off) I soldered a turbo sw to the grn/blk on the section, wallah, turns on psu & stays on to check volts etc of said psu.

Removing all but those 2 makes it much easier to plug in/remove the plug. The molded plastic on both sides make pluggin in wrong impossible, again, almost impossible, where theres a will, theres a way, , , ,

-c-

[redwudz]

Simplest would to just use the existing and working 'reset' switch for power.
And you could always add a common pushbutton switch hooked to the old 'power' switch cable and drill a
small hole on the back of the PC and place the reset switch there. How often do you use the reset switch anyway?

If you really want to replace the original switch, most of the front panels of PCs are removable at the inside sides of the PC case.
Power switches are often hot glued in place and not that hard to remove or replace the same way.
Some are 'snap in'. But finding an exact match for the original switch isn't too likely.

I used a remote mounted reset switch for this computer build:

[Nelson37]

Just swap the wires for the reset SW on the mobo. Takes seconds, no expense, no problem.

Most likely prob with the actual switch is a binding of the plastic external button, or possibly some foreign object jamming the actual switch. Rare that they are actually defective, but not impossible. Most are simple and identical and you could pull one off a discarded PC, or, again, just use the existing Reset SW. You could swap the external switch position on the case if you want to make more work for yourself.

[sophisticles]

I vote that this guy is trolling us. Reminds of of another poster a while ago that would ask for help and give symptoms that were inconsistent with one another and then shoot down all suggestions as not having worked.

Consider this guy's claims:

Shutting down Win 7 powers down the system.
Hitting the power button from within Win 7 powers down the system.
Hitting the power button from with safe mode with command prompt within Win 7 causes the system to reboot.

So the obvious questions I have are:

How much time is this guy spending in safe mode that's it's such an big deal and why is he spending so much time in safe mode with command prompt?
How can this possibly be an issue with the BIOS or power button? Under normal operation, by his own claims, they work properly.

So the only thing left is a troll job.

[kyrcy]

I vote that this guy is trolling us. Reminds of of another poster a while ago that would ask for help and give symptoms that were inconsistent with one another and then shoot down all suggestions as not having worked.

Consider this guy's claims:

Shutting down Win 7 powers down the system.
Hitting the power button from within Win 7 powers down the system.
Hitting the power button from with safe mode with command prompt within Win 7 causes the system to reboot.

So the obvious questions I have are:

How much time is this guy spending in safe mode that's it's such an big deal and why is he spending so much time in safe mode with command prompt?
How can this possibly be an issue with the BIOS or power button? Under normal operation, by his own claims, they work properly.

So the only thing left is a troll job.

I think it's obvious who is trolling who.

Back to the topic I looked in a few local electronics shops but I could not even find the right switch.

However I was lucky to find a switch with its cable from an old PC.

The cable it's a little short and barely reaches the motherboard but it will have to work for now.

[usually_quiet]

Back to the topic I looked in a few local electronics shops but I could not even find the right switch.

However I was lucky to find a switch with its cable from an old PC.

The cable it's a little short and barely reaches the motherboard but it will have to work for now.

Just to be certain, did replacing the switch correct the problem you had? (By which I mean, when you've booted into the "DOS" command window in safe mode, pressing the power button shuts down your system, and it stays powered off until you deliberately turn it on again.)

[kyrcy]

Back to the topic I looked in a few local electronics shops but I could not even find the right switch.

However I was lucky to find a switch with its cable from an old PC.

The cable it's a little short and barely reaches the motherboard but it will have to work for now.

Just to be certain, did replacing the switch correct the problem you had? (By which I mean, when you've booted into the "DOS" command window in safe mode, pressing the power button shuts down your system, and it stays powered off until you deliberately turn it on again.)

It seems that it did.

But I realized that I could also exchange the power with the reset switch on the case and connect the power cable to the position of the reset cable (and the opposite) on the motherboard. Both buttons seem to work and anyway I rarely use reset.