STM32F0 LED's Not Running and Cannot Be Connected to PC

emre-cerci · ‎2015-03-28

Posted on March 28, 2015 at 19:40

Hi all,

I have an STM32F0R8 board and I am a newbie. I have mistakenly touched 5V and GND pins together while the board connected to my PC. At the same time as the two pins touched, LED's LD1 and LD2 went off. After that, I tried to reconnect it to the PC and observed that the power LED LD1 was still not turning on and the computer didn't see any connection.

My question is that if it is burned or not. Is there a fuse on the board? Is there any possibility to recover the device back as its running condition, or should I buy a new one?

Thanks,

Tesla DeLorean · ‎2015-03-28

Posted on March 28, 2015 at 20:40

There is not fuse, the component along the way have been damaged, perhaps the regulator, perhaps some others, short of working through the circuit and replacing nonfunctional parts this is unrecoverable.

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re.wolff9 · ‎2015-03-28

Posted on March 28, 2015 at 21:06

Officially, if you short 5V and GND on your board, you should not damage your board. The victim should be your PC. So try a different USB port....

On the other hand, shorting and then not-shorting pins could lead to voltage spikes that damage your board.