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

[Gerard Bucas]

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> 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> написал(а):
> 
> Hi, there is only one LED(d1) on, anyone can help to on this ?
>  
>  
> Thanks,
> Dawei
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