Firstly failure with 2 years is not good - as has been suggested try contacting Panasonic to see if they will repair it under warranty. Try contacting wherever you purchased it from as well & see if they will sort it out.

Secondly, only buy from Richer Sounds or Costco. You can easily get 6 years warranty from RS, sometimes just by signing up for emails. Here's a filtered list of 48-50" screens under £500:

https://www.richersounds.com/tv-proj...ze_breaks=1365

One key feature is the user interface & some are better than others. LG are well liked & I don't particularly rate the Android TV OS on my Sony. Book an appointment at your nearest RS & they will let you try each one out to see which you like best.