My Passport 1 TB Not Unloking

Hello Lochan, as a troubleshooting step, try connecting the Passport to the back of the PC, avoid using any USB extension cables or USB hubs. If the problem continues, it  would appear that the Passport is faulty and needs to be replaced. Check the link below for more information. 

How to get an RMA, (Return Merchandise Authorization) or replace a defective product under warranty