The voltage isn't the point of issue here, it's the amperage. You should be able to look at the power supply itself and see what the amperage is. If it's not 2.5A or greater (generally speaking) you are likely getting a brown-out on power on which is why you are seeing D2 blink.
- John On 12/01/2015 09:23 AM, Ujjwal Gupta wrote: > Hi John, > > I am using 5.2 V power supply. I checked that I am getting a voltage of > 3.3 V and 5 V on the board (at the headers). > > Thanks, > Ujjwal > > On Tue, Dec 1, 2015 at 5:00 AM, > <[email protected] > <mailto:[email protected]>> wrote: > > Send elinux-MinnowBoard mailing list submissions to > [email protected] > <mailto:[email protected]> > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > or, via email, send a message with subject or body 'help' to > [email protected] > <mailto:[email protected]> > > You can reach the person managing the list at > [email protected] > <mailto:[email protected]> > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of elinux-MinnowBoard digest..." > > > Today's Topics: > > 1. Minnowboard not booting (Ujjwal Gupta) > 2. Re: Minnowboard not booting (John Hawley) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 30 Nov 2015 16:24:12 -0700 > From: Ujjwal Gupta <[email protected] <mailto:[email protected]>> > To: [email protected] > <mailto:[email protected]> > Subject: [MinnowBoard] Minnowboard not booting > Message-ID: > > <ca+y8-xzceymgndwdf8qim08amm0bzj_pwpuuxmoqkaast6o...@mail.gmail.com > > <mailto:ca%2by8-xzceymgndwdf8qim08amm0bzj_pwpuuxmoqkaast6o...@mail.gmail.com>> > Content-Type: text/plain; charset="utf-8" > > ?Hi All, > > I have a board in which the BIOS doesn't bootup when I switch it ON. ? > ?Additionally, nothing comes through a serial debug cable. I see > that one > blue LED is switched ON (power indicator) and another blue LED blinks > sporadically (not sure what this means). > > Has anyone encountered this kind of problem before? > > Thanks, > Ujjwal > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > > <http://lists.elinux.org/pipermail/elinux-minnowboard/attachments/20151130/6a06bec4/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Mon, 30 Nov 2015 15:38:56 -0800 > From: John Hawley <[email protected] <mailto:[email protected]>> > To: [email protected] > <mailto:[email protected]> > Subject: Re: [MinnowBoard] Minnowboard not booting > Message-ID: <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset=UTF-8 > > What power supply are you using? You may just have an under powered > supply which is causing it to try and boot, but not quite make it. > > - John > > On 11/30/2015 03:24 PM, Ujjwal Gupta wrote: > > ?Hi All, > > > > I have a board in which the BIOS doesn't bootup when I switch it ON. ? > > ?Additionally, nothing comes through a serial debug cable. I see that > > one blue LED is switched ON (power indicator) and another blue LED > > blinks sporadically (not sure what this means). > > > > Has anyone encountered this kind of problem before? > > > > Thanks, > > Ujjwal > > > > > > > > _______________________________________________ > > elinux-MinnowBoard mailing list > > [email protected] > <mailto:[email protected]> > > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > elinux-MinnowBoard mailing list > [email protected] > <mailto:[email protected]> > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > > > ------------------------------ > > End of elinux-MinnowBoard Digest, Vol 93, Issue 1 > ************************************************* > > > > _______________________________________________ > elinux-MinnowBoard mailing list > [email protected] > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard > _______________________________________________ elinux-MinnowBoard mailing list [email protected] http://lists.elinux.org/mailman/listinfo/elinux-minnowboard
