were the lenses(lcd) or were the cameras?
If it were the lenses, those lenses act as magnifying glasses and burn the lcd, theres a warning and cover meant to protect the lenses. So if you disregard warning and didn't use the cover the fault is on you.
Also its most likely a purchase a new unit if the lcd is burnned.
If the cameras are exposed to light it doesn't matter you may loose tracking hear and there. But close a few blinds and it will resolve itself.
In what way is it broken ?