External HD not detected

Question

Hi, my dog ate the original power cable that came with Touro Desk 2TB (external HD). I had to buy another power cable, but this time was a generic. The external HD is turning on fine, but iMac is not detecting it. I hope it's because of the new power cable. I only can see some of the external HD information on System Information:
Touro Desk 3.0:
  Product ID:          0x1015
  Vendor ID:          0x4971
  Version:           0.00
  Serial Number:          31001206210000000000
  Speed:          Up to 480 Mb/sec
  Manufacturer:          HitachiGST
  Location ID:          0xfa130000 / 6
  Current Available (mA):          500
  Current Required (mA):          8
Is current available and required mA confirming my thoughts? Please help! My life depends on this. Thanks in advance!!
My iMac information:
  Model Name:          iMac
  Model Identifier:          iMac12,1
  Processor Name:          Intel Core i5
  Processor Speed:          2.5 GHz
  Number of Processors:          1
  Total Number of Cores:          4
  L2 Cache (per Core):          256 KB
  L3 Cache:          6 MB
  Memory:          16 GB
  SMC Version (system):          1.71f22
  System Version:          Mac OS X 10.7.5 (11G63)
  Kernel Version:          Darwin 11.4.2

Answer 1

Now that that thing is fixed, another problem rises...
I formatted the HD in a HFS+ partition and wanted to use the other half of the HD as an NTFS partition for my PC.
So I used the Disk Utility to create a NTFS-3G partition, but that partition didn't appear on my PC, so I wanted to format that partition to an NTFS partition, but I kept getting an error: Not enough disk space on the device to complete the partitioning. (I translated the error from Dutch).
Tha strange thing is that the new NTFS-3G partition is completely empty.