The xbox we were given, crackles when the power cord is attached. Which has the problem - the cord or the unit itself? Unit doesn't turn on at all - no red or green light showing either. I am now thinking the power supply might be the problem? A friend brought over their power cord with the same results ours got.
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It is possible that there is some foreign particles inside one of the connectors. Since the power supply does come apart and also disconnects from the unit, you can try to clean it to see if it will sort out your problem. Here's what to try:
1. Disconnect the AC adapter from the wall and the console. Let it rest for a few hours so that you do not electrocute yourself.
2. Disconnect the wall power cord from the AC adapter brick. Check the connections on both ends to see if it needs to be cleaned.
3. Clean any ends of the adapter with alcohol solution (isopropyl, or "rubbing" alcohol). Make sure the connection to the console is clean as well. Allow to dry.
4. Reconnect all necessary parts and try your console again.
If that does not work, there could be another problem with power flow to the AC adapter or a problem with the adapter itself.
Disconnect the power cord from the back of your console. Unplug the power cord from the wall outlet and the power supply unit. Reconnect the power cord to the console. Then plug the power cord back into the wall outlet and the power supply unit.
Make sure that all three connections are firmly secured.
Turn your console back on. Check the light on the power supply. If this solution worked, your power supply light will be green and the power button will look like this:
Hi,To troubleshoot this problem, try the following steps: Examine the power indicator light that is located in the center of the Ring Of Light on your Xbox 360 console. If there is no power to your console, the indicator light is off and the fans are off. * Press the power button. The power button and the power indicator light are located in the center of the Ring of Light on the front of your Xbox 360 console. If your Xbox is functioning correctly, the power will turn on. * Press the eject button on your console disc drive. If your console turns on when you do this but does not start when you use the power button, there may be a problem with the power button or the console faceplate may not be attached correctly. Contact Xbox Customer Support for more help. If the above step does not resolve the problem, examine the power cord where it connects to your console and to the power outlet. Disconnect and then reconnect the power cord at each end to make sure that you firmly connect the cord. If this does not resolve the problem, see whether the power cord is plugged in to any device other than a typical power outlet. For example, the power cord may be attached to an extension cord. If this is the case, remove this device and then plug the power supply directly into a power outlet. If the problem is not a connection problem, examine the light on the Xbox 360 Power Supply. * A green light indicates that the power supply is functioning correctly. If the light is not green, contact Xbox Customer Support for more help.If these steps do not resolve the problem, your console needs service. Thank you!