Samsung A71 does not charge

[giulio93]

Hi everyone, I have this phone that works fine but it doesn't charge and it doesn't connect with the pc via usb cable. I replace the flat cable and the bottom board but nothing change. It's my first time working on this kind of foult on phone. Where should I start for the troubleshooting?
Thanks

[elecsoluces]

Re: Samsung A71 does not charge

Hello,
Confirm it is A715F.
Check bad soldering on FPC 2x39 pins near battery connector.

[mon2]

Re: Samsung A71 does not charge

Test with another USB cable.

Review the installation of the charge port board.

Confirm the charge board is compatible with your model of logic board.

Test with a known good battery.

[giulio93]

Re: Samsung A71 does not charge

Hello,
Confirm it is A715F.
Check bad soldering on FPC 2x39 pins near battery connector.

Yes it is. The connector looks fine to me

[giulio93]

Re: Samsung A71 does not charge

Test with another USB cable.

Review the installation of the charge port board.

Confirm the charge board is compatible with your model of logic board.

Test with a known good battery.

1) done
2)the port is settle down in place normally
3) the charge board is compatible
4) I charged the battery with a test power supply and it charges fine

[mon2]

Re: Samsung A71 does not charge

Use a USB power meter to monitor the voltage and current draw from the adapter to this phone, while the phone should be charging.

What are the details of the voltage and current draw in this setup?

[giulio93]

Re: Samsung A71 does not charge

Use a USB power meter to monitor the voltage and current draw from the adapter to this phone, while the phone should be charging.

What are the details of the voltage and current draw in this setup?

Here the infos

[Jenzo]

Re: Samsung A71 does not charge

Any chance we could get a close up picture of the connector where the flex cable (flat cable) plugs into the motherboard? I have worked on many of these devices and in so many cases is that connector. You could also test this by pressing down on the cable when trying to charge to see if it makes a difference.

[giulio93]

Re: Samsung A71 does not charge

Any chance we could get a close up picture of the connector where the flex cable (flat cable) plugs into the motherboard? I have worked on many of these devices and in so many cases is that connector. You could also test this by pressing down on the cable when trying to charge to see if it makes a difference.

I press down the connector with much more force and it start to charge! for now I will let it in that way, if the charge will stop again I think I'll should change the connector on mb.
Thank you!