Power on and test it.
Power supply switch won t turn off.
It s better to flip the switch because there will be less wear on the capacitors in the circuitry of the 5vstandby supply.
A loose or unplugged power cable is one of the top reasons why a computer won t turn on.
Verify that the power supply voltage switch is set correctly.
There is no master power switch on this power supply as someone.
Try this called a hard power reset.
Then push power button with line ac cord not connected.
Once the switch has been completely powered off press the power button again to turn it back on.
Flip the switch at the rear of the psu and listen for the internal fan.
See fans spin for 1 second is very very common.
Pull power cord from wall.
O should be down locate the 20 4p 24 pin connector.
1 force restart hold down the power button for at least 12 seconds until the switch console turns off.
See it will turn off.
If the input voltage for the power supply does not match the correct setting for your country your computer might not stay powered on.
Mine won t turn off unless i cut power to the powersupply by either turning off the power strip or pulling the plug from the back.
Power cord back now.
To help protect a computer from being improperly turned off when it s running the power button will not turn off a computer.
A live power connection.
If the computer is frozen or has other problems press and hold down the power button without letting go for 5 to 10 seconds.
Wait 15minutes this further discharges huge capacitors inside.
Holding down the power button allows you to turn off the computer.
Power switch on the power strip surge protector or ups if you re using any of them check for disconnected computer power cable connections.
All i can do then is keep the power button pressed for a few seconds and finally the power supply stops or press the reset button to start the computer again or click the power switch of the power supply in the back of the computer tower off and on when clicked on again the computer keeps turned off.
Chances are your computer wouldn t power on at all if this switch is wrong but an incorrect power supply voltage might also cause your computer to turn off by itself.