[MinnowBoard] Minnowboard doens't work after connecting 12V power

[Wu, DaweiX]

Hi Gerard , I finally tried that recently and my Minnow Max boards work again after replacing U35 chip .  Great ! .  Thanks again.


Thanks,
Dawei
From: Wu, DaweiX
Sent: Monday, June 29, 2015 9:48 AM
To: MinnowBoard Development and Community Discussion
Subject: RE: [MinnowBoard] Minnowboard doens't work after connecting 12V power

Thanks Gerard, I didn’t see smoke and no ‘pop’ heard when I connecting 12V power , and the U35 seems look good . Anyway, I will try your way to fix it .



Thanks,
Dawei

From: elinux-MinnowBoard [mailto:elinux-minnowboard-bounces at lists.elinux.org] On Behalf Of Gerard Bucas
Sent: Saturday, June 27, 2015 7:37 AM
To: MinnowBoard Development and Community Discussion
Subject: Re: [MinnowBoard] Minnowboard doens't work after connecting 12V power

Hi Dawei

I personally 'blew up' 3 MinnowMax boards by accidently inserting a 12V power supply! In all three cases, there was smoke (and a 'pop') and after that only one LED.

In my case I discovered that all three boards could easily be fixed by replacing U35. After we replaced U35 with a new part, all three boards seem to work 100% again.

Of course I am not sure what happened to your board and why it stopped working. I suggest you look at U35 under a magnifying glass and if you see a small spot/damage on it, you will probably have the same problem I had - so worth a try to replace U35 (very cheap part, widely available:
NUVOTON, part# NCT3012S TR).

Good luck!!

Regards

Gerard

On Jun 26, 2015, at 5:53 AM, Wu, DaweiX <daweix.wu at intel.com<mailto:daweix.wu at intel.com>> wrote:
Thanks for your quick reply . Can I fix it by replacing some power chip ?

From: elinux-MinnowBoard [mailto:elinux-minnowboard-bounces at lists.elinux.org] On Behalf Of Grigory V. Korotov
Sent: Friday, June 26, 2015 17:47 PM
To: MinnowBoard Development and Community Discussion
Subject: Re: [MinnowBoard] Minnowboard doens't work after connecting 12V power


Hi.
Probably you need new board. Max dont have any overvoltage protection.

26 июня 2015 г., в 11:15, Wu, DaweiX <daweix.wu at intel.com<mailto:daweix.wu at intel.com>> написал(а):
Hi, there is only one LED(d1) on, anyone can help to on this ?


Thanks,
Dawei
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