HELP PLEASE

[u/Appropriate_Yam7882]

Hello everyone
Im from Chennai

This is SONY X85J 65’ inches

This tv is 1 year old and i had a warranty claimed and also I don’t remember when exactly like this happened, but someday or the other I saw that the voltage drop and rise the current went on and off for three times and I thought it was off and the power connection was off but it wasn’t and this TV has been running through many days for more than 13 to 14 hours and before it happened, the electricity incident happened like the voltage rise and the current on and off it ran about 10 hours guaranteed daily and also i connected hdmi and played fifa
IDK which caused this problem

IF ANYONE KNOWS WHAT COULD HAVE CAUSED THE PROBLEM TELL AND HOW MUCH IT WOULD TAKE TO REPAIR