[Librem-5-dev] devkit powers on but won't boot

[Jeremiah C. Foster]

On Mon, 2019-07-01 at 14:10 -0400, Eric Kuzmenko via Librem-5-dev
wrote:
>     
> 
>     
> 
>     On 7/1/19 1:58 PM, Jeremiah C. Foster
>       via Librem-5-dev wrote:
> 
>     
>     
> >       Hi,
> > I'm having some trouble with my devkit. It powers on (two lights
> > behindthe battery holder turn on) when plugged into my laptop via
> > USB butdoesn't boot. The 'boot mode' switch is set to eMMC and I've
> > tested iton USB as well, there's no discernable difference. 
> >     
> 
>     Make sure you are using a USB 3.0 port to power it, a USB 2.0
> port
>     will not provide enough power. If your USB 3.0 port doesn't work
>     then please use the wall wart we provided with the dev kit to
> make
>     sure it does actually boot up.

The wall wart doesn't help sadly. 


>     
> >       The reboot light flashes when the reboot button is pressed
> > but there isno change in the devkit. No haptic, no screen. 
> > Similar behavior with power from a battery except with the
> > batterythere is only one light lit. 
> >     
> 
>     If the battery meets the specs we've outlined on the silkscreen
> and
>     in the documentation, and it is reasonably charged (3.7V~4.2V)
> then
>     it should be able to power the board. I suspect that either the
>     battery you are using does not meet the specs or it is not
> charged.

I have a fresh 3500 mAh NL1835HP that turns the devkit light on but
still no boot. I also reflashed the device yesterday (see discussion in
dev/librem5 on Riot.)


>     
> >       I've found recently that one of the cables in the has come
> > loose. Imanaged to reattach it using the image in the
> > documentation, so I thinkit is connected corretly. 
> > I'm going to reflash to see if that has something to do with my
> > issue,but that feels like a shot in the dark. If that doesn't work
> > I guess Ineed to soder a UART debug header.

I wonder if someone might recommend a good sodering iron kit for a
n00b? Links to that and a UART header are most welcome.
Cheers,

Jeremiah
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