I have an 320gig iomega external hard drive i can feel the drive running but the light is not comming on and it isnt registering on my lap top as been pluged in

MyVolts 12V Power Supply Adaptor Replacement for Iomega ...

https://www.amazon.ca > MyVolts-adaptor-compatible-...
About this item · This 12V high-quality power adapter is compatible with the Iomega LDHD-UP External hard drive. · The plug fits a US 2-pin wall power socket.
Batteries included: ‎No
Connector type: 2-Pin Rating: 4.4 · ‎47 reviews · ‎$29.34 · ‎In stock

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  MyVolts 12V Power Supply Adaptor ... - Amazon.ca

  https://www.amazon.ca > Iomega-Prestige-External-repl...
  This 12V high-quality power adapter is compatible with the Iomega Prestige 1TB External hard drive. The plug fits a US 2-pin wall power socket. This power ...
  Hard Disk Size: ‎1 TB
  Connector type: 2-Pin Rating: 4.2 · ‎12 reviews · ‎$21.73 · ‎In stock

HQRP 12V AC Adapter for Iomega 1TB External Hard Drive ...

https://www.walmart.ca > HQRP-12V-AC-Adapter-for-I...
Buy HQRP 12V AC Adapter for Iomega 1TB External Hard Drive HD Adaptor Power Supply Cord [UL Listed] + Euro Plug Adapter from Walmart Canada.

Iomega External hard drive LDHD-UP Compatible Power ...

https://myvolts.com > product > Iomega_External-hard-...
Iomega External hard drive model LDHD-UP compatible power supply adapter charger.
US$16.49 · ‎In stock

This model has a firewire port and a usb port
http://www.sb.fsu.edu/~xray/Manuals/Iomega-EHD.pdf
not sure on the driver issue but this link below may shed some light on possible windows 10 issues with iomega drives
http://www.tomshardware.com/forum/249323-32-iomega-external-harddrive-found

https://iomega-na-en.custhelp.com/app/answers/detail/a_id/1235

Iomega portable hard drives connect to your computer through a USB port.
When you connect the Iomega hard drive to your computer, it should pop up as an icon in your
My Computer folder.
If you can't find the icon in your My Computer folder then you probably need to update the driver for the device.
Updating this driver is not very hard and can be done automatically from the Windows Device Manager.

Plug your Iomega hard drive into one of your computer's USB port.
Click the "Start" button and go to the "Run" field.
Type "Devmgmt.msc" into the Run box and press the "Enter" key.
Go down to the bottom of the device manager to the "Universal Serial Bus Controller."
Click on the little + (plus) sign to expand it.
Look for an entry with a yellow exclamation point and click on it.
Click the "Install the software automatically (Recommended)" button and then click the "Next" button.
Click the "Finish" button when the installation has finished.
Go to the "My Computer" folder from your "Start" menu and locate the Iomega hard drive icon.
Double click the icon to gain access to the external hard drive.

Yes you can replace the port, of you can see what hard drive is in the drive and get a new external holder/card for it and use it that way. either 2.5 inch sata or 3.5 inch sata,

My Iomega (33654) 500GB USB isn't working. When I turn it on the blue light comes on for a few seconds. I can hear / feel it working but then the light goes off (it is still whirring inside). The computer isn't recognising it. I think it's still under guarantee but I can't find the paperwork. Do you have any ideas?

If you go to the Iomega website it will say near the top register your product.

You have to create a admin. user account on your computer. You do this from user accounts.

Go to the Iomega Web sight and find tech support or Manuals/Guides and go from There??

Format your hardrive for Mac OS:
Go to Disk Utilities under the go menu in your finder. Select the external drive and click on the erase tab. Clikc erase again and it formats the drive. You can now copy files onto the drive.