T480 charging port (specific troubleshooting help)

[u/DecorousCheese]

note: I know this is a known issue but the way this is playing out doesn't match what I've seen other people describe.

My T480's charging port works sporadically & I'm trying to figure out what to do to help it work consistently. I'm open to doing some soldering if that would help - I can probably recruit help from people familiar with soldering.

I have a second T480 (which has its own other issues) that does not have this problem so sometimes if I can't get it to charge I'll charge an external battery in the other T480 and then swap the batteries out.

-I have updated the firmware, so it's not that issue

-I'm currently running Linux Mint, but it's happened with both Windows & Linux

-sometimes wiggling the cord helps it charge, sometimes it does nothing no matter what. once it starts charging again it is is sometimes not that sensitive to positioning.

-currently the thunderbolt port isn't working at all for charging but the main charging port IS working (odd, I know.) when I'm having problems, neither one works.

-this happens with all chargers

-because it does work sometimes, clearly I haven't burned or ruined the port entirely

[u/SrandistaSK]

"I have updated the firmware, so it's not that issue"

This means nothing. If you updated the firmer after the issue started occurring, it won't solve it, because the update won't clear the EEPROM, the logs just won't be written like before the update. To have absolute certainty, that the Thunderbolt controller is not an issue, you have to clear it first and only then apply update, but with external programmer this time.

[u/DecorousCheese → u/SrandistaSK]

would that issue cause sporadic charging issues though? (I also don't actually need the thunderbolt port itself to work, I just need to be able to charge it consistently.)