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C2000 Launchpad怎么这样了?不是道是哪里的问题



前不久买了个C2000 Launchpad,到手后,测试过没问题,放了一段时间,拿出来再用,出问题了,只要连接上3.3v的那个挑帽,就短路,板子的灯全灭,而且很烫,不知道是哪里的问题啊,,不会是烧了吧,急求高人指点!!!(仿真器模块测试过了,是好的)