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My N+ is dead


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#1 Dixon

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Posted 22 August 2011 - 08:54 PM

Hi, I have been using my N+ connected to the network for a couple of weeks without problems, but suddenly the three LAN LEDs are not brighting anymore, and the DM9161 IC gets warm very quickly after the power is applied to the board. I tried erasing the micro by connecting the testpoint close to D0 to 3V3 but still the same problem. It was working and suddenly it stopped doing so. What can be wrong? Regards, Carlos.

#2 Dan T

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Posted 22 August 2011 - 09:03 PM

IC gets warm very quickly after the power is applied to the board.

Oh. That's rarely a good thing. :(

What can be wrong?

Try looking for bent (touching) pins inside the Cat 5 connector. That's your best bet for a quick fix.

Maybe now you have a Netduino without the Plus?

#3 Chris Walker

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Posted 22 August 2011 - 10:11 PM

Hi Carlos, What do you have hooked up to your Netduino Plus? It sounds like something got shorted out :( As Dan T mentioned, warm ICs are rarely a good thing. Netduinos are reasonably tough, but it is possible to electrocute them. If you plug in your Netduino Plus to your computer, which LEDs turn on? Do you get any "device plugged in" sounds on your PC? Chris

#4 Dixon

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Posted 23 August 2011 - 07:55 PM

Hi Dan T, Cat 5 connector has the pins perfectly, but checking the pins with a multimeter shows that all the 8 pins are short-circuited!!! Chris: Actually there is nothing at all connected to the board, and both less brights. Yesterday when I connected the board to the PC it showed "Netduino" for a second, and then disappeared, but as I erased the micro, now it doesn't show anything I'm guessing the ethernet part is burned somehow, but the micro might be ok. I don't know if I should contact Sparkfun for warranty (as I was not doing anything with the board when it failed, it was just connected to the LAN cable and it stopped working) or maybe it would be a good idea to replace the "HS1198" transformer and try...

#5 Chris Walker

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Posted 23 August 2011 - 11:24 PM

Hi Dixon, When did you buy your Netduino Plus? Chris

#6 Dixon

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Posted 24 August 2011 - 06:34 AM

One month ago

#7 Chris Walker

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Posted 24 August 2011 - 06:40 AM

One month ago

You have mail.




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