The problem here is most likely that the Master Boot Record got corrupted with the power cut. You need to rebuild this to get at your Data now.
I have no personal experience with this particular application but Seagate Recommend
http://services.seagate.com/eStore/Product.aspx?ProductId=6&CategoryId=1
It is a fairly cheap alternative to On Track's Recovery Option but I have no idea of how well it works. On the other hand the On Track product works a treat but it's considerably more expensive.
http://www.ontrackdatarecovery.com/file-recovery-software/
There are several other possible options but here you require something to Rebuild the Partition Tables as apposed to recovering the Data here is a list of the better known Applications used to recover data
http://tinyurl.com/273ay5
http://tinyurl.com/rmvrv
http://tinyurl.com/yvrsl
http://tinyurl.com/yyk8cm
http://tinyurl.com/382vm
http://tinyurl.com/ynwnel
http://tinyurl.com/nc4kx
http://tinyurl.com/2wox7l
http://tinyurl.com/374d8b
http://tinyurl.com/djw6u
http://tinyurl.com/f73se
http://tinyurl.com/8bd3f
http://tinyurl.com/afu2j
While the last 2 are from the same company they are very different products. Win Hex should only be considered foe use by someone who knows Hex Inside Out while Davory is a great cheap General Purpose Application.
Personally I prefer the On Track Option but it's anything but cheap. However because I use this type of software a lot it's paid for itself many times over by now, for a cheaper option Spin Rite from Gibson Research or Stella have both very good reputations by other TR members.
Col