Hey guys, I have a problem; I'm repairing a gateway emachines T6420 with xp, media center pc. When it tries to boot it comes up with disk boot failure, insert boot disk (no change after inserting disk)! I went into bios and of course it's not recognizing any drives, not even the cd/dvd. I replaced the hard drive and cd; the connections are good. Is ther anything I can check other than what I've already done; any suggestions at all!! Please help! Is there a setting in bios I should be looking at? Any help would be deeply appreciated