|If both fail then could be you damaged some cable, connector or chip in the process, Some power, bios hard drive issue. Still possible that your application damaged data on the drive.|
Put a known good drive in and try to load the nt floppies or cd. See if you can get it back working at all with everything but the suspect drives. Also could run live linux cd. Could run barts or ubcd4win and try to ntbackup the drive is only system files are bad.
Could try debug boot and see where it stops and try to repair it.
Playing to the angels
Les Paul (1915-2009)