LG 50PG3000 screen issues - black horizontal line

Hi,

I have an LG 50PG3000 tv (I understand this is quite old!). I have this issue with the screen where there is a black line horizontal line across the bottom - it is not completely black, you can see some picture beneath it - picture attached

. I was wondering if anyone knows if this could be loose connection or whether it is probably just a write off?

Thanks