I think you mean you cannot access the drive, not boot it. Did you follow the instructions from Maxtor? What operating system? Can your model access external drives? The maxtor drive require high speed USB 2 and your old model might have usb 1.
I have just bought a brand new USB powered external HD. The only problem is that the hard drive won't boot for some reason. I get the command to input password to access the HD, but it won't any further. i have tried a million different things from this website to fix the problem but none have worked. I know it is not the hard drive because I have tried it on 3 other computers and they all have worked on it. The HD is a black armor Maxtor 160BG. I would really appreciate it if someone could help me out to get this HD working. Thanks.