How long ago did you check the wires? The most popular answer to this topic is to replace light bulbs, or you can check the condition of the wires. I don't want to give you the advice about hitting the panel hard, although that's the second most popular solution, haha. To be honest, it's hard for me to imagine how and why this can happen. Moreover, all options for solving this problem seem wild to me. I haven't encountered this error, but people on the forum say it's a kinda common occurrence. Find a good LED backlight as powerful as a smart bulb.