Mine did that before I just powered the Switch off and when it came back on the WiFi worked fine. I thought it was my router at 1st but literally everything else I had was working fine.
I powered it off and on, didn't help. Undocked it, didn't help. Finally I undocked it and sat literally 3 feet from my router....now it works.

Fred.

even those it still looks unharmed, I'm so fukking paranoid now. Like will this drop have lasting effects on anything from inside switch. I'm currently checking if the fan is busted, but I hear it blowing.

thanks. I feel like I needed that.