ok so me and my bro bought all the new stuff to build a pc, so we put everything together load xp everything is running very nicely,we reboot comes up again nicely, so i shut down came home tried to boot again and nothing at all, wont even go into the POST no beeps no output on monitor or anything, ive checked all the connections on the board everything is secure, i then tried to boot from my old hd which had 98 on it but still same thing nothing at all any suggestions thanks