External hard disk not opening

[Ali2107n]

Hello . I connected my hard disk to a notebook . Had to use a different adaptor for notebook and it damaged notebook screen and also my hard disk affected apparently .
Now in my own notebook it shows the hard disk but can not open. It shows unallocated in disk management .
I tried possible solutions I could find in web, but still not working. I assume that voltage change affected this as I read in a post in microsoft page. But still cant fix it . I d be very grateful if you can help me fixing it.

 

[Tmagic650]

That "different adapter" probably damaged the external hard drive, so that nothing can be recovered. Have you tried any "free" recovery tools. Google is your friend

 

[Ali2107n]

It doesnt allow for format or any other change.
It gives error : I/O device error .
In properties it shows it works fine
I read somewhere it is because of cpu voltage change. From c1 to c2 and had some changes in register . But that didnt fix either.

 

[Tmagic650]

The I/O Device error means that the drives on-board controller has been damaged

 

[Ali2107n]

First thank you for reply. Second ,is it possible to fix ?

 

[Tmagic650]

No, not really. If you had an identical drive you could remove its logic board and assemble it on the bad drive and try to recover data that way

 

[Ali2107n]

Thank you