xbox 360 jtag power brick problem

Hello! Months ago I tried to update my jtagged Xbox 360 to the avatar update (I think) from this site, after doing that it stopped turning on. So basically when I turn it on I don't see red color, so that's weird (because online I see that red color indicates something is wrong), I see the...

Hi. I'm new here in the forum. I'm here because of my xbox360 jtagged power problem. The moment I connect the power cord it turns red but never turns green after I pushed the power button. Seldom it turns on/ powers on. It seems I have tried everything I read and viewed at you tube. TIA to those...