@Kevin_Z 

Hi Kevin

I'm not sure the status of the lights when it has the problem, I will look and tell you next time it does it.

Yeah I can see the SSID but when I try to connect to it it says something like failed to connect to the network. 

OK I will try pinging it.

Yes the firmware is up to date. 

I did a factory reset of the router last night, I'm hoping it has fixed the problem but it's early days yet.  I've only set up my VDSL, WiFi password/SSID and turned off WPS, everything else is the factory settings I believe.

I wondered if it could be some memory leak or something.  I turned on traffic monitor many months ago and was unable to turn it off, it would say some error message.  Now it's been factory reset traffic monitor is off, still the router was working fine for 10 months or so with it on. 

@Kevin_Z 

Why are 1, 6 and 11 the best channels to use?  Aren't they the same?  I use channel 2 as channel 1 is used by neighbour, I could try 6 or 11 if no one is using them, there isn't a lot of wireless traffic in my area.  My transmit power is on high (the default I believe).  I just checked and neighbours router is using 6 and 11 now, not 1 anymore. 

I bought the archer vr600 in FEB 2019.

The problem mostly happens in the evening and it didn't happen last night so hoping the factory reset has fixed it!!

@Kevin_Z 

I have set the router to your settings, channel 11, 20mhz and middle power.  Do you think the WiFi chip could be overheating?  It's strange as we had a hot summer yet now its fairly cold and that's when the problems started, so not sure if it's overheating, unless the heat from summer damaged it.

I bought it from Amazon, it says my return period has passed but do I have a guarentee with Amazon or TP-Link?  As it's less than a year old.

I thought it might be fixed but it did it again last night, I took some pictures though.  Hope I can add them to the thread?

As you can see the routers lights are all on

I can't get to admin panel with chrome or firefox on wired PC

I can ping 192.168.1.1 with wired PC (first time I tried and was surprised)

On my laptop it first said connected no internet when it lost the connection (the laptop was on and connected at time of failure) - I thought when this happened before it had totally lost the connection to router but maybe not, I can't get to any websites though. When I disconnect and try to reconnect I get the last screen, unable to connnect.

Another thing, I went to the router and noticed the WiFi on/off button on the side, so I pressed it and long pressed it and nothing happened on the router, I have never used it before but shouldn't it turn wifi on and off?  So then I pressed the on off button, unplugged it for a minute then plugged back in and turned on. The underside of router was quite warm but not overly so I thought, but gave it some time to cooldown anyway.

@Kevin_Z 

Since changing the wifi settings to what you wrote I have nearly 5 days uptime now, the longest it's been for 2-3 weeks now.  I'm hoping the problem has gone.  I'm thinking it must be the transmit power that fixed it.  My neighbours seem to have a new router, it has about 6 AP's using 2.4 and 5ghz as they are using Sky Q.  I wasn't using the same channels as them but perhaps it affected my router somehow. 

Thanks for the help

It finally crashed again last night, after nearly 2 weeks I reckon, so I contacted Amazon and they are sending me a replacement router!

@Kevin_Z 

Yeah, I will run it at medium transmit power from when I get it, as I think running it at high might have damaged the wifi chip, can't be sure but worth a try.