There can be several reasons why an LED lamp can stop burning. It can be bloat or short circuit in one of the capacitors, a burned-out chip on the driver, or loss of contact between the driver and the base. The most common cause of bulb failure is the burnout of one of the LEDs on the board. The easiest thing to do is simply replace the bulb! I always do this, even with the interior light at Vont Smart Light Strip For Car. I get some problems if I use cheap versions of the bulbs from China! But after the last change of bulbs to more expensive ones, I do not see any problems!