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STM32F4 Discovery, ST-Link not working

Question asked by Zheke on Jul 29, 2014
Latest reply on Jul 29, 2014 by Zheke
Hi i'm new using ARM architecture i bought the STM32F4 Discovery Evaluation Card, it stop working after trying to load my first program, the demostration code no longer runs, the only thing is doing when i plug the USB cable is, LD2(PWR), LD4 and LD8, my pc does not detect the device it says USB Device Not Recognized, i'm using MDK-ARM it no longer detects the device, glad someone could help me, i couldn't even load my first program :/, Sorry for my bad english

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