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Make sure the tower is getting power. There will be a green light on the back of the tower where the power cord goes. Make sure the cord is snug and that it is securely plugged in to your power source - I'm hoping it is a power surge strip and in which case, make sure the surge strip didn't get unplugged or turned off. If you have it plugged directly in to the wall then make sure that outlet has power by plugging something else in to it that you know works. After doing all of this, make check to see if there is a light on the back of your pc. If not, unplug the power from the back of the tower, wait 30 seconds at least, and then plug it back in. Hit the power button on the front just once, if it doesn't power up, press and hold the button in for a 2 seconds and release. If that doesn't work, your power supply may have gone bad. That happens from time to time. Good luck, hope this helps!
very easily just remove the face from ur tower.usually first remove the side panel then ether there will be screws or push?squeeze thingies that will let the front cover come off.then u will see the switch and be able to remove it
You have troubleshoot all that devices. first of all, make sure that all the power button connector correctly attached. After that look that processor is properly attached or not. Then check SMPS, that's OK or not.
Try unplugging the power cord from the backside of the unit - press the power button for 30 seconds - release - plug in the cord and press power, if nothing comes on and you hear no sound it must be the Power Supply Unit (PSU) which should be replaced. Assuming that the outlet you are connected is powered ON and there is no other external electrical problem.
Read the labels for the connectors on the motherboard.
Polarity does not matter for the POWER and RESET buttons.
If the lamps for AC-POWER or HARD-DRIVE-ACTIVITY do not light-up when you expect them, then reverse the connector.
Try the PC SPEAKER connection one way, and then shutdown
the computer, reserve the connection, and start the computer.
If the "beep" at start-up is better, leave it as-is.
If the "beep" does not happen, or is quieter/distorted, reverse the connector.