Thank you @Kevin_Z for a super fast reply. I did those things but sadly, it doesn't work. The laptop that is wireless-ly connected to WR740N repeater has an internet, the cabled Desktop PC does not....

Good day! I have successfully setup TL-WR740N as a repeater to the main internet router. How do I setup the TL-WR740N repeater to connect a device through ethernet cable (cat5e)? (Buying a wi-fi usb...