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The Natural Philosopher  wrote:
> On 11/12/2024 16:46, Daniel wrote:
> > Andy Burns  writes:
> >
> >> Daniel wrote:
> >>
> >>> Jeff did a teardown on his second channel and soldered a m.2 socket
> >>> hoping it was properly designed. He found the power lines weren't traced
> >>> in so no power.
> >>
> >> There were some nearby component missing too, maybe the Rev1 board has
> >> bugs, and they need a Rev2 (or whatever) but his soldering job looked
> >> relatively clumsy (bridged pins etc).
> >
> > Yeah, it was pretty bad, at least he was honest about it.
> >
> > I am sure things were missing to keep the circuitry disabled and I'm no
> > engineer.
>
> Why would you put support chips on if you were not going to install an
> M.2 socket anyway?
>
> I think he called it right in that this is a bare bones model, and more
> upmarket versions will emerge in due course.

Looking at:
https://www.jeffgeerling.com/sites/default/files/images/pi-500-m
-socket-install.jpg
https://www.jeffgeerling.com/sites/default/files/images/pi-500-pcb-bottom.jpeg

I think there's a MOSFET and some decoupling capacitors missing (to the left
of the middle larger hole), so the power isn't connected.  There may be a
pair of missing capacitors in series with the PCIe lane, but I can't
immediately see the footprints for those.

Theo

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