If you have a pc you can even live-boot linux of some kind on (avoid using windows, you wont be able to mount the partition there anyways), and it has an IDE port or you have a USB -> IDE, easy way to check is to boot into linux environment with hard disk plugged in and running, run the following
sudo -s
mkdir /mnt/n2hdd
lsblk
Find 5th partition on the n2 hard drive (presumably this will be a seagate but few are also WD drives)
Then from same terminal execute below, replacing <hdd device> with the name of the partition (e.g. hda5)
mount -o ro /dev/<hdd device> /mnt/n2hdd
cd /mnt/n2hdd
ls -a
If you see a boot folder containing aeinitrd, aevmlinuz, aebootparams, prod.img and an exec folder within containing boot and v386 (assuming the drive is 3dx+), the hard drive is at least accessible. While this does not guarentee data integrity it will give a good indicator of if the hard drive is totally shot or not.