OS 10.12.6. My son has a 2TB Lacie external HD which has stopped working.
I plugged it into my hub and like on his desktop, it didn't show on mine either. I checked dick utility and it wasn't there. I then connected it directly into the back of my computer and it still didn't appear. I then gave it a few sharp knocks but to no avail. I know how to dismantle it but my question is, do I need a special instrument to test it?
Is there anything else I could do before opening it?

jaybass


OS 13.6.6 iMac (Retina 5K, 27", 2017, 3.4 GHz Intel Core i5, 24 GB RAM, 2400 MHz DDR4. SuperDuper. 1 TB Lacie HD