I have a couple of hard drives that were in a laptop where the LCD screen failed. Once removed and "different" hard drive inserted, the laptop worked until one day it too blackscreened. I purchased an lcd inverter and that worked, but just for a short time. I purchased a second one and that one didn't last much longer than 2 months if that long.
However with both inverters inserted & working the handful of hard drives with the mystery command that turns on the screen still turned them off. I even tried attaching an external monitor to the laptop in order to bypass the blackscreen but I could literally hear the laptop turn off the monitor. When I would start up the laptop, you could see everything all of the startup text before switching over to the laptop. At that point it would attempt to switch turn on the monitor evidenced by the visual click I can hear when it first connects and you can briefly see that the monitor came on and then immediately black out.
My only thought is that this HAS to be a virus, one which is installed on each of these hard drives because they all do the exact same thing.
And Just FYI the software has to do with surveillance that the software company requires go through their server which I was never too keen on.