Maybe you might have resolved it already. But incase someone needs it this is how I resolved it..

After having purchased the router I followed the setup instructions and got the same issue just like you did.  I struggled a lot to fix the issue but no luck.

After a few days, this time during setup I chose the "Connection Type" as PPPoE and left the username and password blank and saved it. It worked.. I get the internet. But surprisingly internet LED blinks in orange color and in console also it shows "Internet Status" in red color. But I get internet access without any issues. 

@Kevin_Z 

Hi Kevin, I can access the internet by directly connecting the ISP cable to my laptop without providing username and password.

But I am getting internet after connecting the cable to the router only for PPPoE type (left username and password blank since I don't know them). 

@zikry Hi! I recently had a similar problem. What I "accidentally" did was that I ticked the IPTV/VLAN so that it became ENABLED. And the mode is set to Malaysia-Unifi. If you haven't done this yet, maybe you can try? But of course, fill in the corect PPPOE username and password. This worked for me (but still there are other bugs that I still need to look into and maybe want TP-LINK to resolve, hopefully)

GOOD LUCK!

zikry wrote

Recently, I bought a new router (Tp-link Archer C80 AC1900) and I followed all of the setup guide accordingly. All of the LEDs displayed green except for the internet LED, which is red/orange in colour. Due to this, I cannot continue with the setup process because of the no internet. The modem and the internet provider (Unifi) has no issue and works fine as usual. My question is, how do I fix this internet issue? Is the router not compatible? Thank you in advance.

@Kevin_Z 

I am from Sweden. Here is the screenshot.

@Kevin_Z 

Hi,

I am also facing the same issue. please send details to me also at satishkuncham@hotmail.com

Thanks

Satish