Desktop: Dell XPS 8700, Win 10 Pro 64 bit version 1803, Avast Premier, Malwarebytes Premium, all current. Laptop: Dell Inspiron 5537, Win 10 Home 64 bit version 1803, Avast & MBAM as for the desktop.
2 TB WD My Book external HDD usually attached to the desktop machine. 3 TB Seagate Backup Plus external drive used mostly for Macrium Reflect backups of both machines, not connected except during backups.
A week or so ago a couple of large rambunctious dogs got into my workroom momentarily. Before I could eject them they had hit the power cable of the Seagate drive and yanked it onto the floor from the 28 inch high table on which it rested. At the time the drive was powered up, but not connected to either computer. The floor is linoleum over wood.
Today I wanted to use the Seagate to run a Macrium backup. I found that connecting the Seagate to the desktop computer disabled the mouse (wireless) and the keyboard (hardwired) and the control connection to the APC UPS. The computer would boot up, but would receive no input, and generated continuous error messages of several kinds. Disconnecting the Seagate external drive's USB 3.0 cable restored normal function of the computer.
This is a major nuisance, but not a disaster (I have a 2 TB WD My Passport drive on which I can make the planned backup, and if necessary could buy another external drive and repeat the full backups of both computers). Question arising, how to find out what's wrong with the Seagate Backup Plus, and if possible retrieve the files from it? Bearing in mind, of course, that recovering the data is not worth more than the cost of a new drive. Replacing the drive would be the worst-case scenario, since the full backups are repeatable and contained nothing that is not still on the computers.
I live in a small farming village; the nearest "computer repair facility" is probably a Staples store about 50 miles away. I'm probably the nearest thing to a "computer tech" in these parts, but a) I am out of practice and I don't have any diagnostic equipment at hand and c) that Seagate unit doesn't look like a DIY service job to me <G>. It lights up when connected to a computer (but not when powered up but not connected via USB) and is definitely spinning (you can just barely feel it) when powered up. Also: the My Passport is perfectly happy connected to the computer using the same USB 3 cable I used for the Seagate. So I have to think hitting the floor did something to the Seagate.
Thanks for enlightenment!