How do you fix the lights on the stereo that have burnt out?

To fix burnt-out lights on a stereo, first, unplug the device to ensure safety. Open the stereo casing, usually by removing screws, to access the burnt-out bulbs or LED indicators. Replace the faulty bulbs with new ones of the same type or, if applicable, solder in new LEDs. Finally, reassemble the casing and plug the stereo back in to test the lights.