Model No is S231HL, for reference.
As I was packing to leave my dorm, I unplugged it for the first time in a long time. It was working just a few minutes before this. I then realized I wasn't sure which cord was which between it and my external harddrive, so I plugged both back in. I believe that I got the cords correct on the intial guess (but could be wrong), thus one possible symptom of the problem is that the incorrect power cord was plugged in at some point.
In any case, the correct power cord now exhibits absolutely no response from the monitor. The monitor's power button does not light or exhibit response when pressed, and the screen is, of course, black. I can't really provide any more information; simply nothing happens when the monitor is plugged in.
The power supply is split into two parts, and the part that connects to an actual outlet is firmly plugged into the miniature power-box. The power-box lights up upon connection to an outlet.
Any idea what could be going on here?
Incorrect Power Supply: 12V, 2A
Correct Power Supply: 19V, 2.1A
Since the incorrect power supply inputs less voltage than the correct one, it doesn't seem like the incorrect one could have fried it...