@moldylunch you obviously created a huge TAB error when it tore off. Basically what that means is that the signal from the LED board to the panel is no longer conducted through the ribbon cable which is bonded to the panel. You could try and overlay the cable and use some strong clothes tape to secure it. Some people have managed to use liquid conductive adhesive to glue the traces of the cable to the corresponding contacts on the panel. You would have to ensure that you do not get anything conductive between those contacts. In reality it’s a PITA to fix but not impossible.