My xbox 360 slim has a green light when not plugged into tv, but turns red when plugged...

Even though it's an old console as you have performed self repair no one here can help.

i had my power brick on my SLIM plugged into the top outlet that is controlled by my light switch,i unplugged it and plugged it into an outlet that wasnt and it works fine. Before the light on my power brick was turning red and now its green when its on
and orange when its off thanks guys.

Just as a question. Is it possible my wireless adapter is broken? I turned on my Xbox and the light was solid red and it said there were wireless networks with no signal strength, and then when I unplug it and plug it back in the light turns solid green
and all of a sudden I have full signal strength.

hey man try this its not official and dosent always work..

It will only start charging when you’ve left the battery pack with a “red light” charge signal. This means when you first plug in the controller, and the light on the cable connection goes red, the signal is saying that it needs to be charged. The problem
comes when it thinks it is charged and switches off or to a green colour.

To get the red signal:

1) Plug the charging cable into the xbox, and switch the xbox on without the controller attached to the cable.

2) Plug the controller into the cable, once the dashboard has booted and you’ve signed in.

3) Wait until the cable connection light goes red, and then switch off the controller (hold down the 360 button and select “Turn Off Controller” from the menu).

4) Restart the xbox (or if you live close by to someone else with a 360, turn that console on with a cable plugged in, wait for it to boot to the dashboard, and then attach your controller – the light should stay red).

5) Plug in the controller once the dashboard has booted again.

This might be fiddly and not work every time. It’s a case of trial and error most of the time. I will keep playing about with the procedure, but for the time being this seems to work for me.

Or Try This..

http://www.youtube.com/watch?v=RKM2tABhNk8

MY xbox power supply shows a green light when it is plugged in the wall only (not in the console yet) when plugged in the console too it shows a green light again but here the Xbox doesn't turn on. It's fan only powers on and runs really loud (burning smell
too). the Xbox doesn't respond. I heard when the Power brick is plugged in the wall only it needs to have an orange light not green.when plugged in the Xbox too then it goes green.

could this be caused by the power supply?

Sounds like a power supply issue