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LAUNCHXL-CC13-90: What will cause failure of launchpad board?

Part Number: LAUNCHXL-CC13-90
Other Parts Discussed in Thread: CC1352P


When I tried to connect the board to SmartRF studio, I noticed that the board is shown as unknow device, then I smelled something burning, the MCU on XDS side became too hot to touch. Looks like the board is toasted now.

My question is, what would cause the board to fail? ESD? The USB cable still works with my other CC13XX launchpads. And I don't see visible shorts between PINs on the board.