If the input voltage for the power supply does not match the correct setting for your country your computer might not stay powered on.
Power supply switch won t turn off.
A loose or unplugged power cable is one of the top reasons why a computer won t turn on.
First you want to turn the power switch at the rear of the power supply to the off position.
Power switch on the power strip surge protector or ups if you re using any of them check for disconnected computer power cable connections.
A live power connection.
O should be down locate the 20 4p 24 pin connector.
If the computer is frozen or has other problems press and hold down the power button without letting go for 5 to 10 seconds.
There is no master power switch on this power supply as someone.
Power cord back now.
1 force restart hold down the power button for at least 12 seconds until the switch console turns off.
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.
Once the switch has been completely powered off press the power button again to turn it back on.
See it will turn off.
Bend the paperclip and insert one end into the green pin ps on and the other into any of the black pins ground.
Capacitors vary widely in quality with some brands likely to fail in about 3 years coincidentally those power supplies tend to have warranties of 3 years or less while other brands will almost certainly last at least 5 10 years 5 year warranty is a sign of this.
Try this called a hard power reset.
Wait 15minutes this further discharges huge capacitors inside.
Power on and test it.
Then push power button with line ac cord not connected.
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.
It s better to flip the switch because there will be less wear on the capacitors in the circuitry of the 5vstandby supply.
Pull power cord from wall.
Holding down the power button allows you to turn off the computer.
See fans spin for 1 second is very very common.
Verify that the power supply voltage switch is set correctly.