Letter g keeps "sticking" on laptop, even though the keyboard is disconnected

I have a Dell Inspiron 15 3000 series laptop, and, at first, the letter g stopped working... Taking it off and cleaning it didn't work... No big deal, I just ordered a new keyboard.

Then the g key started sticking sometimes, typing gggggggg anywhere there was a cursor, and trying to select icons starting with g. After a bit longer, it was sticking all the time. It got to where I couldn't even sign in. I can't type my password. It just starts typing endless g's without stopping. (This all happened within about 15 minutes)

Here's the crazy part. I disconnected the keyboard, and started it up. It's STILL TYPING g's! How could it possibly be typing without a keyboard!!!!!??? I tried connecting a USB keyboard and going to safe mode, but it won't recognize F2 or F12 or anything on boot up, because the g's are taking over everything.

All I can do now, is boot to the Win10 login screen, and I can't type my password because it fills up the textbox. That's it. I can't do anything else. I can't even click on the 'ease of access' icon. It won't show it.

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