Do you happen to know the model number or any other information about the drive? What was the port you stuck a power jack into for? (Obviously not power, as you've come to learn).
For what it is worth if you have a USB Keyboard, that works with the Wii's Browser.
As you've learned plugging random things into exposed power plugs is not a proper troubleshooting step. I've had friends do the same thing before they gave up and asked me to take a look, and their steps were to basically take every unplugged connector inside the machine and shove it wherever it fits, completely destroying the entire system, which was, of course, my fault somehow.
Live and Learn. It's a shame you had to learn at the expense of such a nice laptop, though. If it's still under warranty you might be able to contact the retailer it was purchased from or Lenovo directly, as long as you omit the detail where you shoved arbitrary power backwards into the USB Host Controller.
I have fixed many desktops that took lightning strikes etc as well as one that took a direct hit and amazingly the CPU and RAM was good, but the PSU, Motherboard, and the HDD was toast.
CPU and RAM were probably fine because they are "behind" the Motherboard's Voltage Regulator Modules which probably blew up.
