Can't access remote laptop desktop

I have a big tower computer with an ASUS mobo, and an ASUS U50f laptop, both machines running Win 10 Creators Pro, and successfully private-networked together wirelessly via a Linksys E1200 modem. I can run remote desktop on the laptop to access & use the tower, but not access the laptop via remote desktop from the tower, even though its Explorer shows the files & folders on the laptop, so networking is going between them. I think I have all the remote desktop settings right on both machines. There seems to be something obscure mis-set on the laptop that's blocking remote desktop from the tower. I see the right rules and turn-ons for address 3386 in the laptop's firewall. Suggestions? Thanks!

Hey bachware,
Unless that's a typo or you've changed RDP ports, the default port is 3389

Yep. Typo. 3386. The tower computer doesn't have wi-fi, but is networked to the Cisco/Linksys E1200 via wire, which provides wi-fi connectivity. The laptop has its own internally. I can RDP to the tower machine from the laptop fine, but not the reverse (from the tower machine to the laptop).