Azure sphere problem, not working

Hello, i recived my azure sphere free kit, but after 3 minute of idle, the board stopped working. Now I don't had 3.3v on board, and if I stop the buck converter via epen pin and I put an eternal 3.3v source, the external 3.3v source heats up a lot. By checking with the multimeter, it's a short between 3.3v and GND

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mvp over 6 years ago +2

This problem solved! Thanks to David Lopez Rubio ( https://www.hackster.io/contests/SecureEverything/discussion/posts/5218?utm_campaign=new_comment_for_feed_post&utm_mediu… ) the solution is simple and…
mvp over 6 years ago in reply to clem57 +1

This fix must remain a last resort. Before this, apply the steps recommended by Peter Fenn: https://www.hackster.io/contests/SecureEverything/discussion/posts/5218#comment-108593
peterfenn over 6 years ago +1

It is unlikely that the onboard DC/DC regulator will have failed! For small number of kits where a power issue has been reported, the cause is more likely the high threshold of the Starter Kit's under…

bwilless over 6 years ago

Hi Baciu,

I'm sorry you're having issues with your kit. You should be able to contact the site that shipped it to you for a replacement.

Brian
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mvp over 6 years ago

This problem solved! Thanks to David Lopez Rubio (https://www.hackster.io/contests/SecureEverything/discussion/posts/5218?utm_campaign=new_comment_for_feed_post&utm_mediu… ) the solution is simple and with minimal costs and repair time. With usual tools and a widely available MPS Buck Regulator 5V to 3.3 V and 2A, anyone can fix it. If you have a hot-air soldering station: better final aspect. The Azure Sphere board, which is a marvel of technology, works again as new.
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clem57 over 6 years ago in reply to mvp

Wow. Excellent fix.
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mvp over 6 years ago in reply to clem57

This fix must remain a last resort. Before this, apply the steps recommended by Peter Fenn:
https://www.hackster.io/contests/SecureEverything/discussion/posts/5218#comment-108593
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peterfenn over 6 years ago
It is unlikely that the onboard DC/DC regulator will have failed! For small number of kits where a power issue has been reported, the cause is more likely the high threshold of the Starter Kit's under-voltage lockout circuit.

Use the following troubleshooting steps to determine if this is the cause of 3.3V power failure on your Starter Kit:
Try a different USB cable
Connect power from a different 5V source (eg. cell phone charger)
Try connecting the USB cable to a different computer
Avoid using an unpowered USB hub.
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abiansh over 6 years ago

Same issue here. Checked with multi meter and indeed there is short between 3.3v and GND. Right now I do not have tools to check solution from David Lopez Rubio (https://www.hackster.io/contests/SecureEverything/discussion/posts/5218?utm_campaign=new_comment_for_feed_post&utm_mediu… ) .
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bfgelectronicspower over 6 years ago

I unsoldered the regulator, and I put an 3.3 ldo voltage regulator.
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