Hi David_Bn, what you have asked me to do has logic, so I have turned off the router overnight to allow to cool down. I have then turned on again this morning and the red light still comes on solid where the white light usually is, no other lights come on other than when booting up.
I was frustrated by support as there was no logic in what they asked me to do from the huge amounts of information present on this forum. I explained the problem, even sent them a link to the threads on here yet they still wanted to do a period of monitoring my router traffic despite me saying I wasn't noticing an issue with my speed or traffic. They would not deviate from their script and when you have a clear issue that seems to be hardware related and considering my 25 plus years experience as an IT worker and 6 years working on switching in networks I do have a reasonable grasp on what is logical in this area.
Thanks for your help and I have replied to your private message.
All the best.