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dead mbed

Topic last updated 17 Aug 2010, by Chris Styles. 4 replies
Abhishek Dutta
17 Aug 2010

Hi,

My mbed suddenly stopped working today. I noticed this when the MBED drive did not show up during restart.

I checked the Vin and GND pins and it correctly reports 5V. I also checked the Vout pins and it reports 1.? V.

The blue LED does not glow. Moreover, none of the 4 LED glows when I reset the device.

 

Is my mbed dead? Please help.

 

Abhishek

Abhishek Dutta
17 Aug 2010

One more thing:

 

When I connect my mbed to my USB (Linux) nothing shows up in the "dmesg" output. No "USB connect" event is show in the status log.

 

Bye

Vlad Cazan
17 Aug 2010
Try plugging in your mbed while you hold the reset button. This has worked for some people when working with the filesystem.
Abhishek Dutta
17 Aug 2010

Thanks for the reply

 

But it doesn't work. I kept the reset button pressed when I switched mbed on. Then I plugged in the USB.

 

Nothing happens.

Chris Styles
17 Aug 2010

Hi,

Have you tried powering the mbed microcontroller from the VIN pin?

Can you also give us some back ground on what you have wired up to your mbed (a circuit diagram would be good), and what your software was doing at the time.

Any other information you have would be great.

Thanks,
Chris