@NeatNit, I did as you said (I was actually avoiding that way as I would have to reconfigure all of my 7 devices). It's working up to now. Let's see how it goes through the day. 

Thanks. 

@Hillsman Did the problem get solved after factory reset. 

@JSN, unfortunately no... 

Last night it lost internet connection twice in an hour... I just wake up today and orange led again... 

I've seen a lot of complaints like that about others Tp-link routers, and it seems that nobody got a definitive solution. 

Maybe a new firmware update would do the trick. 

The problem still keeps going...

I have two more days before the time to get my money back expires... I'm sad because when it's working, it really has an amazing reach and speed... 

@Kevin_Z, I did as you asked and I hope it will do the trick:

The status is as follows in the pics below;

Both connections goes out at the same time (wired an wireless);

Connecting the modem directly to the notebook did bring the internet back to that specific device;

I cloned the Mac address from the notebook;

Returning internet cable back to the router didn't solve the problem, led was still orange.

I restarted the router and it's working for now on (as it aways do for a while after turning it off/on). 

Hi.

I have exactly the same issue with my C6.

I'm on newest firmware.

Every couple of days I'm loosing internet connection.

Simple AP reboot doesn't fix anything, I need to switch modes to make it run without factory reset.

If you need me to do something particular to help track down the issue, let me know.