Power supply with red light flashing

Power Supplies don't usually make humming noises. If your Power Supply is in a non-ventilated area it will overheat and the temperature will raise, the Power Supply may show a red light and your console may show 3 flashing red lights or no light at all.
if you encounter 3 red lights try the Flashing Lights Solution, if you encounter no power try the No Power Solution. If the Flashing Lights Solution or the No Power Solution doesn't solve your problem your Power Supply will need to be replaced.

Yes, I understand that, that means that there is an issue with the power supply and it needs to be replaced.

Flashing orange, solid red, or no light: Your power supply may need to be replaced. Try the following solutions:

1. Try plugging your console’s power supply into a different electrical outlet. Do not use a surge protector.
   
   
2. If the power supply light is solid red or flashing orange, unplug the power supply and let it cool for 30 minutes. Then, plug the power supply back into the outlet.
   
   

If your power supply light is still flashing orange, solid red, or unlit, your power supply needs to be replaced.

Hi Kai Que,

On the console, is it blinking or solid red light? A blinking red light on the power button means that your console doesn’t have enough ventilation. The red light will continue to blink until the console cools down. If solid red around the power button,
it is possible that you will need to replace the console.

https://beta.support.xbox.com/help/xbox-360/console/power-button-blinks-red

On Power supply, flashing orange, solid red, or no light: Your power supply may need to be replaced. Try the following solutions:

1. Plug your console’s power supply into a different electrical outlet. Do not use a surge protector.
   
2. If the power supply light is solid red or flashing orange, unplug the power supply and let it cool for 30 minutes. Then, plug the power supply back into the outlet.
   

If your power supply light is still flashing orange, solid red, or unlit, your power supply needs to be replaced. You can
order a replacement Xbox 360 power supply from our Xbox Online Service Center. Console registration is required to replace the power supply under warranty (the power supply warranty
is the same as your console warranty).

Hello gamer friend,

If your power supply is flashing orange, solid red, or no light it may need to be replaced. Before asking for a replacement though try the following solutions:

Try plugging your console’s power supply into a different electrical outlet. Do not use a surge protector.

If the power supply light is solid red or flashing orange, unplug the power supply and let it cool for 30 minutes. Then, plug the power supply back into the outlet.

If your power supply light is still flashing orange, solid red, or unlit, your power supply needs to be replaced. You can Order a replacement Xbox 360 power supply from the Xbox Online Service Center here:

myservice.xbox.com/en-us

Flashing orange, solid red, or no light: Your power supply may need to be replaced. Try the following solutions:

1. Plug your console’s power supply into a different electrical outlet. Do not use a surge protector.
   
2. If the power supply light is solid red or flashing orange, unplug the power supply and let it cool for 30 minutes. Then, plug the power supply back into the outlet.
   

If your power supply light is still flashing orange, solid red, or unlit, your power supply needs to be replaced. You can
order a replacement Xbox 360 power supply from our Xbox Online Service Center. Console registration is required to replace the power supply under warranty (the power supply
warranty is the same as your console warranty).