LCD TV suddenly has dark spots?

Li
3

I sold an LCD TV that worked flawlessly also with a PC connection. I also demonstrated it and everything worked. The customer took him with him and now wants his money back because suddenly there are dark spots when he connects his laptop. What can be the reason?

Ra

Private - sale would be sold as seen. Returns actually excluded. Business sales are different, 2 years guarantee etc…

Li

I said that too and now there's a threat of charges. My concern is where the spots suddenly come from that were not there during the operation and the demonstration

Ra

I wouldn't worry, the effort would be too high. If the television hadn't been okay, he wouldn't have bought it.