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

[Jeremiah C. Foster]

On Tue, 2019-07-02 at 07:25 -0600, Angus Ainslie via Librem-5-dev
wrote:
>     Hi Jeremiah,

Hi Angus, thanks for the reply.
>     
>     On 2019-07-01 11:58 a.m., 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. 
> >     
> 
>     Which image did you flash ?

I can't remember exactly, but I think it was a fairly recent one. As
you know I flashed another image yesterday so I imagine my original
image has been overwritten.
>     
> >       The reboot light flashes when the reboot button is pressed
> > but there isno change in the devkit. No haptic, no screen. 
> >     
> 
>     If you flashed a 5.2 image there will be no haptic.
> 
>     
> 
>     
> 
>     
> 
>     
> >       Similar behavior with power from a battery except with the
> > batterythere is only one light lit. 
> > 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. 
> >     
> 
>     That shouldn't stop it from booting but might affect the display.
> 
>     
> >       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.
> >     
> 
>     From what you posted to the matrix channel it sounds like the
>       board is not getting past u-boot.

This seems highly plausible to me. 
>  I've seen this with a few images
>       when the u-boot env isn't correct.

I think there has been some eMMC corruption so this is also highly
likely.
>  If you point me at the image
>       you used I might be able to diagnose it without you connecting
> the
>       debug header.
> 
>     
> 
>     Soldering on the debug header will make debugging way easier.

I think at this point this seems like the best approach.
Regards,
Jeremiah
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