>Hi,
>my old disk drive in my USB to SATA 3.5" Hard Drive enclosure died so I bought a new one (2TB) and plugged it in. However, when I power the enclosure on and plug it into my USB port, nothing happens. Even if the disk has not yet been formatted, shouldn't the PC recognise it as a new drive? Or maybe my enclosure has died too?

Try a different USB cable - I have had several go bad....maybe you'll get lucky