you are idiots, that's what the problem is.
pogo pins can short out shit when not aligned right. shorting out shit kills xboxes. has happened with matrix, chameleon, x2+. everyone keeps saying don't use pogo pin shit.. yet people keep doing it to save 10 bucks on installing.
check the entire area with a magnifying glass for damage, especially the d0 point. if it doesn't help, swallow it down and get a chip installed properly next time.