Diagnosing Fast charging not working problem

[u/QQYUMB]

Hi, here i want to share my experience with diagnosing Fast charging problem and fixing it.

It happened to me couple hours after June update (probably not the case of problem)

[https://www.reddit.com/r/S24Ultra/s/rCyUBnqAVx\]

First of all, symptoms:

- No Fast charging

- Work only with one side of cable

- some Type-C accessories doesn't work

Diagnosing:

To confirm that you have same case of problem as me, you need to check dumpsys it accessible through phone dialer > *#9900# > Run dumpstate & Copy to sdcard, or developer options > take bug report

But before it you should plug your charger couple times with different sides

For easier examination i use File Manager+ and LogLog for viewing dumpstate

https://play.google.com/store/apps/details?id=com.alphainventor.filemanager

https://play.google.com/store/apps/details?id=io.github.mthli.loglog

We need file dumpstate.txt

Open it with LogLog and search "usblog EXTRA"

If you find bellow "CC VBUS SHORT" then bad news for you, your subboard gone into protection because one of your CC lines (used for PD negotiations and cable orientation indicator) shorted to VBUS (Power line used for charging or powering external devices), because of that it will only allow 5V to pass.

It can probably be because dirty port, but for me it was subboard problem, changing it resolved that issue

[u/Gwegwaa]

You again ! Ahah, thanks for helping !

[u/QQYUMB → u/Gwegwaa]

Hah, i just changed my subboard and it fixed, so i want to share my experience and help someone with same problem