Issues with my Dell laptop

Hey everyone...

I've got a Dell Inspiron 15 here, and I'm running into a bit of a headache—the keyboard just isn't responding at all.

Honestly, I'm a little lost on where to even begin. I can't tell if I somehow toggled a setting in the software, or if the keyboard itself finally gave up the ghost, or if we're looking at a motherboard issue.

Quick side note: the touchpad is working perfectly fine, and some of my function keys actually respond, but the numbers and basically everything else? Nothing.

HELP

If the motherboard gave up the ghost, you wouldn't be seeing anything on the screen at all. Have you actually checked if all your drivers are properly installed? If we're talking about an older machine, there's a decent chance the keyboard itself just died, or maybe some circuitry got fried, leaving certain keys unresponsive. To me, this smells like a spilled drink somewhere along the line.
Assuming your drivers are all accounted for, you might want to try updating macOS or perhaps just doing a clean install. If the laptop is still under warranty, don't mess around—just take it straight to the service center.