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5V pin no longer supplies 5V; other problems too

Question asked by styskal.matthew on Sep 2, 2011
Latest reply on Sep 3, 2011 by Andrew Neil
Yesterday I hooked up my STM32VL Discovery board as the 5V power source for a simple circuit (powering the STM32VL itself from USB). It worked fine. However, today the 5V pin is only supplying about 3V (and the 3.3V pin is only supplying about 2V). In addition, the red LED on the STM32VL noticeably dims when the circuit is connected (although it may have always done this; I can't really remember), Ubuntu no longer mounts the 33MB storage on the board, Windows 7 says "one of the USB devices connected has malfunctioned", and Keil uVision 4 cannot find the STLink.

Did I somehow break my STM32VL? Is there anything I can do at this point to restore it to full function?

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