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Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Tue Jan 07, 2020 7:15 am
by Helder
Since you jumped in here you need to fill us in better. Do you have continuity from the 5V gpio to the 5v test pad or the D1? Not the FB3 since that is just a left over on that image from another fix for someone.
You say the connector cable but have you looked into the connector cable connector for bent pins? This happens quite often when people plug it upside down and try to force it in.
Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Fri Jan 10, 2020 3:19 pm
by santoryu3SS
So I do have continuity from both the 5v gpio/test pad, and I made sure not to force the cable in. I then checked for bent pins but all of them are perfectly fine.
Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Fri Jan 10, 2020 6:05 pm
by Helder
santoryu3SS wrote: ↑Fri Jan 10, 2020 3:19 pm
So I do have continuity from both the 5v gpio/test pad, and I made sure not to force the cable in. I then checked for bent pins but all of them are perfectly fine.
Ok the other thing is the GND is there good continuity? also does the whole thing work if you plug in a micro usb to the Pi? if not then there is a definite issue with soldering.
Show me some pictures of the soldering of the pi to pcb and also from the top down to see if there are gaps between the pi and pcb.
Re: No power to Minty Pi V3 via battery. PiZero USB powers up just fine
Posted: Tue Jan 21, 2020 9:06 pm
by M_Splosive
I'm having the same problem. I hope this gets figured out
Re: No power to Minty Pi V3 via battery. PiZero USB powers up just fine
Posted: Fri Jan 24, 2020 7:41 am
by Helder
M_Splosive wrote: ↑Tue Jan 21, 2020 9:06 pm
I'm having the same problem. I hope this gets figured out
Did you do the continuity tests I mentioned above? 99% of the time it's your soldering, either a weak GND or more often than not it's the 5v GPIO is not properly soldered.
Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Thu Feb 06, 2020 9:38 am
by Kevin
I have the same/similar problem.
I can boot just fine with USB power. The battery charges fine with the charge led changing from red to green. When I try to boot from battery the screen turns white, the disk (SD) access light flashes green, then after a second or two everything shuts down. It’s as if the pi decides “nope. Voltage too low, shutting down”. But the battery should be fine (hardly used but 6 months old, and I t charges to a green light state).
I read continuity on the GPIO power measurement.
What should I try next? A new battery? It hasn’t been used, other than trying to boot a few dozen times.
Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Thu Feb 06, 2020 11:19 am
by Kevin
I may have to do some more checking.
Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Mon Feb 10, 2020 7:41 pm
by Helder
Kevin wrote: ↑Thu Feb 06, 2020 9:38 am
I have the same/similar problem.
I can boot just fine with USB power. The battery charges fine with the charge led changing from red to green. When I try to boot from battery the screen turns white, the disk (SD) access light flashes green, then after a second or two everything shuts down. It’s as if the pi decides “nope. Voltage too low, shutting down”. But the battery should be fine (hardly used but 6 months old, and I t charges to a green light state).
I read continuity on the GPIO power measurement.
What should I try next? A new battery? It hasn’t been used, other than trying to boot a few dozen times.
Check the battery voltage to be sure it actually has a charge and also when you power it on through USB power test the voltage at the TX test pad. If the voltage is 0 there and not around 3.2v then you have a pi with a dead TX pin which can sometimes happen from ESD discharge or anything really as it's a sensitive pin. This pin is crucial to have voltage or the mintyPi will shut off after a few seconds.
Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Wed Feb 24, 2021 7:44 am
by EC2017
What do I set my multimeter to to test the TX pin and where do I place the probes on my multimeter?
Re: MintyPi 3- Powers from Pi USB but not Power Board
Posted: Sun Feb 28, 2021 8:30 pm
by michaelE2
I am having same issues. i have continuity on D1, FB3 and the GPIO pins but there seem to be an issue with the 5v. I aam unable to get 5v test to the GPIO. When i use the multimeter to test for 5v. it shows zero. I am short of ideas on how to proceed. I have been on this for over 2 weeks now. Any pointers will be highly appreciated