Could be many things. We need more info. Some things to check. Are you using the power adapter that came with the router? Have you tried different Ethernet cables? Are you plugged into the correct ports per the user guide (modem to router and router to the PC)? Have you powered cycle the modem, router, and PC before testing? I like to power all off and then power the modem up, wait, till it stabilizes, then power up the router and wait for it to stabilize, then power up the PC, and then test. Have you followed all the steps in the user guide?

@ArcherC8 hello. 

So to clarify some things...I don't have the main internet router since its a different floor from where I am. The internet is connected to different households using a long ethernet cable that when connected to the laptop it directly connects but when I put the ethernet cable to the tp link router it doesn't connect at all. Am pretty confused since it's a fairly new router and never used it. I am using everything that was in the box of the router and inserted the correct cables to the respective ports.. 

@Trueth 

 

I would recommend using this article to try and get the internet connection working on your router: https://www.tp-link.com/us/support/faq/138/

@Tony hello. 

After following the instructions from the link you sent, the router isn't connecting to the ethernet cable