Looking at the fate of my friend's sony tv pannel which lasted just for 6 months, I have taken one precaution - I have connected the tv via UPS.
When i enquired about such untimely fate of my TV, there were various reasons
1. Sudden poweroff due to power cut (Me including many)
2. Bad HDMI couple (Samsung guy who came to install new TV)
3. Panel Life as per Sony officials
4. Panel Life by a Ex-LG Engineer
And then i analyzed various complaint across internet and concluded that first two reason depend upon fate but last two reasons are bitter truth.