I tried to solder the alternative d0 point on the bottom of the motherboard because it looked larger.
Well I have burnt that spot, then I hooked up the motherboard back to the xbox and tried to boot up.

It didn't boot.

Please help me, I can't use xbox anymore.

You created a gap in the trace. It's a simple fix for pros....but because you messed it up I wouldn't suggest that you try it. Think about sending it to a person who can do it or if you want to tempt fate....I can walk you through it.

I PM you a reply