I am not as optimistic as CB1 that you might repair the launchpad. If the green LED (D4) smoked, then you had high voltage on the 3.3V rail and both TM4C123 devices on the board will be destroyed. Sorry, but I don't think you will have any chance of repairing that board for less than the $13 cost of a new one. EK-TM4C123GXL
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