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<div class="moz-cite-prefix">On 7/2/19 11:58 AM, Jeremiah C. Foster
wrote:<br>
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<div>On Mon, 2019-07-01 at 14:10 -0400, Eric Kuzmenko via
Librem-5-dev wrote:</div>
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<div class="moz-cite-prefix">On 7/1/19 1:58 PM, Jeremiah C.
Foster via Librem-5-dev wrote:<br>
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<pre>Hi,</pre>
<pre>
</pre>
<pre>I'm having some trouble with my devkit. It powers on (two lights behind</pre>
<pre>the battery holder turn on) when plugged into my laptop via USB but</pre>
<pre>doesn't boot. The 'boot mode' switch is set to eMMC and I've tested it</pre>
<pre>on USB as well, there's no discernable difference. </pre>
</blockquote>
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.<br>
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<div>The wall wart doesn't help sadly. </div>
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<pre>The reboot light flashes when the reboot button is pressed but there is</pre>
<pre>no change in the devkit. No haptic, no screen. </pre>
<pre>
</pre>
<pre>Similar behavior with power from a battery except with the battery</pre>
<pre>there is only one light lit. </pre>
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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.<br>
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<div>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.)</div>
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Based on what you wrote I doubt this is some power issue, it is more
likely that u-boot isn't pointing to the right location for the
image as Angus pointed out in his email<br>
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<pre>I've found recently that one of the cables in the has come loose. I</pre>
<pre>managed to reattach it using the image in the documentation, so I think</pre>
<pre>it is connected corretly. </pre>
<pre>
</pre>
<pre>I'm going to reflash to see if that has something to do with my issue,</pre>
<pre>but that feels like a shot in the dark. If that doesn't work I guess I</pre>
<pre>need to soder a UART debug header.</pre>
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<pre>
</pre>
<pre>I wonder if someone might recommend a good sodering iron kit for a n00b? Links to that and a UART header are most welcome.</pre>
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You could pick one up at either radio shack or fry's. I personally
don't have mine soldered on, I just bent my pins so that they touch
the through hole when I stick the header in.<br>
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<pre><div style="font-family: Cantarell; font-size: 16px;">Cheers,</div><div style="font-family: Cantarell; font-size: 16px;">
</div><div style="font-family: Cantarell; font-size: 16px;">Jeremiah</div></pre>
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