It's knackered. Accept it. It looks 2nd hand from a chav family. .
Someone said is grade C in his post. The tv is working not with major damage: example : software damage, screen not clear , parts missing or any other defects.
The same at any items? You contradict your self. Is an item. Don't matter what. English dictionary : broken definition: 1. past participle of break2. damaged, no longer able to work: This tv is in perfect working order with 12 months guarantee. They don't sell a broken tv " not working tv" they sell a tv in perfect working order but damage. Is a big difference.
A TV is not a smartphone. Smartphones move a lot so marks, small cracks etc are expected. A large TV is 99.99% of the time stationary and so should have no damage. If it's got a cracked part it's broke.
Part of casing is broken. If you sell your smartphone and the back case is broken, you can't say in your description, "broken smartphone for sale" because I will think is a broken item and I don't wanted. On other part you can say broken back case and I will replace it. Right?