
Hey Guys,
@John - Welcome to PCHF. We have a wonderful staff of techs here, and I feel certain that we can get you up and running with your new HDD.
@Crab - Ordinarilly, power would not be a first concern in a situation like this.
@John - OK, did you reinstall XP after installing the new HDD? Are you using the new HDD as an additional, or as your main? It is always a good idea to reinstall your OS after installing a new HDD, it allows the OS to reconnect. You should be able to reinstall without losing your data, but you will probably need to reinstall some drivers, programs, etc. I wouldn't give up on the drive just yet.
Looking forward to your reply,
TTFN
LGW