Get out your wattage conversion chart, which should have come with it, and double-check your calculations to be sure that the converter has not been overloaded. If neither of the above measures are effective, look at the converter itself. It is a good idea to keep a few spare bulbs on hand as well. Check that the manufacturer of your LED light strip offers individual replacement bulbs. Make sure your replacement bulb has the exact same ANSI letter code, voltage, size, and shape. Oils from fingers can leave an unsightly burn mark on an LED bulb's surface at the least and create another fire hazard at the most. Never touch the bulb with bare hands use protective gloves or a paper towel. Carefully remove any bulb casing if it has one. If you find that your lighting strip has a parallel circuit, follow the guidelines for replacing a burned-out LED bulb of any size. Many brands of LED replacement strips are readily available, and in many cases, they are easier alternatives to replacing individual bulbs. If you find that your LED strip was internally wired with an old-style serial circuit, similar to older strands of Christmas lights, it is time to replace the lighting strip because in this case all bulbs go out if one burns out. Depending on the type of circuit, serial, or parallel, you may be able to replace the bulbs individually. If one or more of the bulbs has dimmed or gone out, check the manufacturer's documentation for the type of circuit that was used to put the LED light strip itself together. Are your red and black wires attached to the correct input terminals on the converter? Are your switches connected to the correct (120-volt) side of the converter? Is your converter itself located in a well-ventilated area? If your answer is negative to any of these questions, you may have found the answer to what is wrong with your LED light strip. Now, continue to check wires and connections. If you see any exposed wire (even a small length) where too much coating has been stripped off, replace the wire immediately because this presents an immediate fire hazard. Tighten any wires that have come loose-but not too tightly. Then, check that none of your wire connections from the converter have come loose, which is a common cause of many LEDs going out, flickering, or dimming.
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