The computer you're trying to access it from is PC running windows correct?
Mac uses GUID partition table rather than master boot record for the boot volume so you can't boot it natively on a PC, and they use HFS file system rather rather than FAT or NTFS.
To access a Mac formated HFS volume you need a program like HFSExplorer
which will give you read only access. There is also a program called MacDrive
that is not free but has a 5 day trial and provides read/write access.
For linux there is a driver called HFS+ that allows you to access it.
Also there is another comercial solution for windows http://www.paragon-software.com/home/hfs-windows/
If the drive still has some life in it that should be all you need; if it's completely dead the freezer/ fridge trick may helpEdited by veritas-truth - 5/9/11 at 6:36pm