Where to send laptop in for repair? / keyboard not working

Alienware X14. The keyboard isn’t working but when using an external keyboard all works fine. I updated all drivers and nothing. Last resort, I reset it to factory settings and kb still doesn’t work.

I’m assuming it’s a hardware issue at this point.The laptop fell from my desk earlier this year but hasn’t had a problem since I always use the Bluetooth external keyboard, but with new job I’m having to be running around with the laptop, so not always connected to an external keyboard/ mouse.

1. Any suggestions what I need to swap out or would it require more diagnostics? I’m not pc techy

2. If I end up sending in for repair (out of warranty) should I still send it in to Dell or are there third party repair places that might be less expensive?

Tks