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Pc powers on after switching socket on and off

1Gigabyte
By 1Gigabyte
in Power Supplies
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17 hours ago, 191x7 said:

It probably is the power supply.

 

Probably, most likely, not.  The PSU isn't going to turn on until it gets the signal from the motherboard to do so.  Even if you flip the switch on the back of the PSU on and off and on again.

 

17 hours ago, 1Gigabyte said:

This problem started a while ago where my power button wasn't working but now I have changed it and it worked fine for a while. A month or so ago it stopped responding again so I would switch the power socket in my wall on then press the power button and nothing would happen. Then I switched the socket off and on again and the pc would fire right up. This was the same with the power supply on/off switch where I would press the power button on the front of the case, nothing would happen, I turn power supply switch off and back on and again fires right up. Any ideas on how I could fix this? 

The problem is either a bad power button or a problem with the motherboard.  The power switch shorts the two pins the button is attached to and that sends a signal to the PSU to turn on.

 

You can check to see if it's just the switch on the case by just taking the connector off the two pin header and shorting the two pins together with something like the tip of your screwdriver.  Also, many motherboards these days also have a power button on the board itself that over rides the case's power button.

 

If it still doesn't work, you can set the BIOS to "power on after power failure" and use the switch on the back of the PSU to turn the PC on, but you'll wear out the PSU's switch by doing that for too long.

Posted

This problem started a while ago where my power button wasn't working but now I have changed it and it worked fine for a while. A month or so ago it stopped responding again so I would switch the power socket in my wall on then press the power button and nothing would happen. Then I switched the socket off and on again and the pc would fire right up. This was the same with the power supply on/off switch where I would press the power button on the front of the case, nothing would happen, I turn power supply switch off and back on and again fires right up. Any ideas on how I could fix this? 

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It probably is the power supply. Test it unconnected to the PC like this:

 

M.S.C.E. (M.Sc. Computer Engineering), IT specialist in a hospital, 30+ years of gaming, 20+ years of computer enthusiasm, Geek, Trekkie, anime fan

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  • Author

The power supply boots up but only when I press the power switch (motherboard) then turn the wall socket off then back on.

 

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17 hours ago, 191x7 said:

It probably is the power supply.

 

Probably, most likely, not.  The PSU isn't going to turn on until it gets the signal from the motherboard to do so.  Even if you flip the switch on the back of the PSU on and off and on again.

 

17 hours ago, 1Gigabyte said:

This problem started a while ago where my power button wasn't working but now I have changed it and it worked fine for a while. A month or so ago it stopped responding again so I would switch the power socket in my wall on then press the power button and nothing would happen. Then I switched the socket off and on again and the pc would fire right up. This was the same with the power supply on/off switch where I would press the power button on the front of the case, nothing would happen, I turn power supply switch off and back on and again fires right up. Any ideas on how I could fix this? 

The problem is either a bad power button or a problem with the motherboard.  The power switch shorts the two pins the button is attached to and that sends a signal to the PSU to turn on.

 

You can check to see if it's just the switch on the case by just taking the connector off the two pin header and shorting the two pins together with something like the tip of your screwdriver.  Also, many motherboards these days also have a power button on the board itself that over rides the case's power button.

 

If it still doesn't work, you can set the BIOS to "power on after power failure" and use the switch on the back of the PSU to turn the PC on, but you'll wear out the PSU's switch by doing that for too long.

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