Yes, but that's a hidden defect. If I sell you a TV, pretending that it was working perfectly when I know for a fact that there's a component in it that has 90

Yes, but that's a hidden defect. If I sell you a TV, pretending that it was working perfectly when I know for a fact that there's a component in it that has 90% chances of blowing up in the next month, you'd be perfectly right to complain and expect me to pay you back your money after your TV exploded.