On 22/01/18 08:30, R.Wieser wrote:
> Dave,
>
>>> Thats odd, as the red led is directly connected to the 3.3v power, and
>>> thus *cannot* be switched off.
>>
>> Not according to the Pi 3 schematic.
>
> Damn.  I googled it and went with the "I feel lucky" result.  I guess I
> wasn't ...   A later result mentions its actually connected to something
> switchable.  So, my bad.
>
> It would still not not be a bad idea to check the power supply though,
> starting with placing a led on the +5v power pins (to see if power is
> actually present).  Apart from the wiring problems I mentioned, if the Pi is
> connected to that 6Amp power supply its just possible that it doesn't
> work/stabilize all that well on lower currents, and as such causes the Pi to
> brown-out.
>
> Regards,
> Rudy Wieser
>
>

I put the positive lead onto a 5v pin on the pi 3 and the led did light up.

I am not using the psu now as I realised it shouldn't be need yet just
for 1 led.

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