A) this is becuase you fried your chip becuase you installed it into the xbox in the wrong mode w/ the programmer attached which will fry it.

this is becuase your connection to the motherbroad is bad, that's been said to happen alot of experianced users advise useing a longer screw as the screw you take out when the washer and the modchips pcb are added is only in about two threads on the screw.