So after lots of research and merely wishing to have a more up to date TV than my perfectly working but 14 year old Pioneer Plasma TV, my wife and I treated ourselves and spent £3,499 plus additional insurance with John Lewis on a Sony Bravia XR-65A90J, on 18th November 2021. 
Apparently the state of the art TV announced in April 2021. 
It arrived on 24th November. 
It’s had light use (not in the day and not every evening) and on 5th February 2022 my wife turned it on to watch some Winter Olympics. A few minutes later, 2 clicks heard, screen goes blank. An hour of following the power off, try a different socket etc. procedure all to no avail. Red LED flashes 5 times, pause, 5 flashes and so on. 
Spoke to John Lewis (tried Sony Customer Service but it was a Saturday so they’re closed of course…! Obviously we don’t use their products at weekends…) 
The not so local approved repair centre came out to collect it on Monday 7th PM. Asked how many times the red LED flashes and plugged it back in to confirm. Yes, 5 flashes. Looked at each other ‘that’s the screen’….

To cap it all, Sony have already announced the A95K replacement in January 2022 and consequently devalued our A90J which has been £500 less to purchase since January, not because it’s in any sale…,
Still no news, and Sony keep asking me who collected it even when I have replied and they reply to the email containing that information. 
Our 14 year old Pioneer Plasma never missed a beat and I sold it working, albeit for peanuts.  Before that I had a B&O TV which lasted for about 15 years. Had a tube replaced… after 12 years!

Do we ever want to see our - repaired but less than 3 month old TV back - absolutely not. 
Options I’ve give Sony are (and yes, I’ve been in retail for over 30 years, I know about consumer rights!):

1. FULL refund and they can do what they like with it. 
2. NEW replacement (or an “UPLIFT” replacement) and £500 refund. 

I’m absolutely disgusted that a £3,499 TV from Sony, allegedly state or the art technologically, fails (and evidently not the only one of these to fail - or to have the screen fail in early life) after such a short time, is already devalued by Sony, and currently Sony can’t even read an email properly, let alone respond appropriately to my call and as they requested, my follow up email with receipt attached. 
Currently listening to music (as we have no TV…) through my utterly reliable 1979 Quad amplifier and pre-amplifier…