when trying to start xbox 360, get green light, then immediately flashing red light and it...

Hey there LONGINPCFL!

I'm sorry to hear you're having issues with your console. Let's see what we can do to get things sorted for you.

I have some questions for you that will help us better understand the situation:

1. What style of Xbox 360 console do you have?
2. How long has it been having the issue you're describing?
3. When did you replace the power supply? Before or after the issue started?
4. When the console is on and running, does it behave normally (aside from the 480p resolution)?
   
5. The console turns itself on and off even when no one is touching it or any controllers?
   
6. How many lights are flashing on your console?
7. Which lights are flashing on your console?
8. What color are the lights that are flashing on your console?
9. What color is the light on your power supply?

Also, here's four different guides on flashing lights. Since I'm not sure what console you have and what lights are flashing, I'm going to link them all. Let us know if any of these apply to your situation:

• Flashing Green Light:
  support.xbox.com/.../flashing-green-light-on-power-button.
• Flashing Red Lights:
  support.xbox.com/.../flashing-lights-solution.
• Original Xbox - One Red Light:
  support.xbox.com/.../one-flashinglight.
• Original Xbox - Three Red Lights:
  support.xbox.com/.../three-flashinglights.

Let us know and we'll work with you from there! ^_^

My XBox wont start. It keeps messaging XBox needs service and the lights flash red, green, red, green, red green. what can I do?

A flashing green light? This means the disc tray is opening and/or closing. Unless you ment to say a flashing Red light which means the Xbox 360 Slim is overheating.

Flashing green light on Xbox 360 S console

The indicator light flashes green when the disc tray is opening, when the disc tray is about to open, and during ordinary DVD drive activity. For more information, see

Flashing green light on the Xbox 360 console power button.

Note If an indicator light flashes green other times, such as when the console is turned off, you may need to request a console repair.

Web translation:

I was playing and the red lights appeared

I was playing and the red lights appeared

Response:

Hi there,

for any red light issues please check the steps on this link:
https://support.xbox.com/xbox-360/console/flashing-lights-solution

or
https://support.xbox.com/xbox-360/flashing-lights/power-button-blinks-red

Those links should have all steps to try when you encounter red lights.

Let us know the results