Ok so i have done a standard reflow and thermal paste cleaning on this 360. It originally had the e73 error which i believe was a cold solder on the gpu or south bridge. It booted fine for a couple of days. Now it will turn on but i dont get the green rolling lights and no video or sound I also recived error 0002 but this only happend about 2 or three times periodicly through out the 100 times iv turned it on and off. If i conenct a controller it acts like its syncing all lights will spin but nothing happens. Same thing if i use other chords and eject button to turn on and a differnet sisterboard (not sure what its call the board with the pwoer button). I have tried to felow a couples times since and removed x-clamps. Im not sure what to do as i have not ran into this problem and it seems i cant fidn a good answer about this problem. Could this be a bad south bridge?? bad gpu??? cpu??? any ideas would help thanks guys in advance