With the very announced short seen the surge from the supply msy just have slammed the drive good along with the floppy drive. But before giving up totally one idea would be leaving the drive slaved in the way it is now but trying a different method for data recovery.
The partition may be simply unaccessible to the Windows installation on the second machine. To get around Windows altogether one method is booting up with a live for cd Linux distro like the latest ubuntu 7.10. To see how easy that is to use once the iso disk image is burned onto a cd-r the image shows how easy it is to copy files even from an external usb drive to one of two internal sata drives.
Sometimes one small bit of partition information corrupted or lost will prevent Windows from seeing onto an otherwise intact partition on a drive from another case. A live distro can access Fat16/32 and NTFS partition types alike. The 7.10 is supported until 2009 by then already seeing the 8.04 release finished.
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Hopefully the drive heads are still good where you can use something like a live distro or data recovery software(some free, some retail). The alternative is the far more costly data recovery services where you bring a spare drive or blank media along with you for someone else to see what can be saved when reading directly off of the drive's platters for a large fee!