[Solved / Archived] Zero2Go Omini Rev2

I think the first step is to measure the actual input voltage and the output voltage of your Zero2Go board. The voltage measuring should be done with and without the load (not necessarily to be a Raspberry Pi).

@admin Thank you for your reply.  Sorry I am quite new to this - do you mean measure from gnd/vout on the zero2go?  That shows as 5.26 with and without the Pi.

@ukdanr

Posted by: @ukdanr

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do you mean measure from gnd/vout on the zero2go?

Yes, and you need to measure the Vin as well.

You may want to compare the results with the voltage values when your Pi is connected.

@admin Thanks for clarifying.  Here are the results:

No pi:

VIN: 5.05
VOUT: 5.26

With pi:

VIN: 5.03
VOUT: 5.26

Do you have any further suggestions please?

@ukdanr The voltages are all good. The problem is not on the Zero2Go board.

You need to find out why your Raspberry Pi does not boot up with correct input voltage.

Check the connection (Zero2Go powers Raspberry Pi via GPIO header) and the SD card on your Pi etc.

@admin Thanks.  The Pi is in working order and boots when directly plugged into a mains adapter.  The connection looks fine.

If you are using Raspberry Pi Zero without 40 pin header pre-soldered, you may want to check if the header has been well soldered.

You can confirm the voltage that actually feed to your Pi, by measuring the voltage on the +5V pin in Raspberry Pi's GPIO header.

@admin Thanks, the Pi came with headers pre-soldered and it has worked in the past.  I measure 5.25 on the Pi's +5V pin, so that seems fine.  Odd.

@admin  Hello, I've since tried with a brand new Pi Zero 2, and it is not working either.  Surely this must be an issue then with the zero2go?  Open to other suggestions.  Thanks.

@ukdanr As I previously said, the problem is NOT on the Zero2Go board.

Zero2Go board's job is to feed 5V to GPIO header of Raspberry Pi, and it does that already. As for why your Pi doesn't boot when correct voltage is applied, that's something you need to figure out, but it has nothing to do with Zero2Go.

@admin Apologies, I had forgotten that we had tested that 5V was being received by the Pi.  Presumably the software dependencies for zero2go do not come in to play at this level then, it's just as simple as it is feeding the pi the power.  I'm just at a loss as to why it was working and now doesn't on three Pi's.  It must be something daft and I'll have to figure out what that is.