[Cialug] Raspberry Pi HDMI issue

[Dan Hockey]

Put a volt meter on one of 5v pins on the gpio. The problem I ran into with
my first pi 3 was that when hooked up to the 7" touch screen the usb ports
and wifi would shut off. If the 5v line dropped below 4.8v during boot up
even if it for less a second the usb and wifi would shutdown and not come
back even after a successful boot up.
I used a usb power meter to test my usb wall warts and found that some
would not supply 5v, and when using a bad cable made things even worse.

On Thu, Sep 29, 2016 at 10:44 AM, David Champion <dchamp1337 at gmail.com>
wrote:

> I just got a pi 3 and it shows the rainbow screen even with the higher amp
> adapter that came with my adafruit pi 2 kit. May need something more
> potent.
>
> -dc
>
> On Sep 29, 2016 10:14 AM, "L. V. Lammert" <lvl at omnitec.net> wrote:
>
> > On Thu, 29 Sep 2016, Dan Hockey wrote:
> >
> > > There will be a rainbow colored square in the upper right corner of the
> > > display if your voltage is below 4.9 volts.
> > >
> > Have not seen that, .. guess I'll have to write a shell script to kill
> > raspistill if the system can't ping a remote host.
> >
> >         Thanks!
> >
> >         Lee
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