The other day I was upgrading my friend's laptop to a bigger hard drive. I removed his current drive a Hitachi HTS721010G9SA00 and installed the new Western Digital drive. Once done installing Windows and I hooked up his old drive to an external hard drive kit. Powered it up and a puff of smoke came from the drive . After unplugging it and removing the logic board I see a burnt spot on the board and knew that was the end. So I order the same model drive and replaced the logic board from the good drive. The drive now powers up but is not recognized by OS or BIOS. Upon closer inspection I noticed there are slight differences with each drive.

Comparison
http://imgur.com/ekFh5.jpg

1. Will this replacement board work?

2. Do I need the same exact hard drive? Identical?

3. Where do you recommend I look for a drive?

4. What other information would be helpful to you?


As a bonus I included a picture of the bad logic board if it helps. Marked the burn spot with a red dot too!!
http://imgur.com/kEKYs.jpg

PS: I know this is my first post and it lacks a proper introduction. Forgive me.

You are looking in the wrong place to find out if the logic boards match.


If you want to match the boards, why not look at the boards themselves? =)