Bob, I haven't seen a Thinkpad in decades, but here's a wild guess: your problem description suggests a bad jack. Is it possible the jack allows power to flow but a connector part is broken that signals the computer it has something plugged in? For example, you've probably seen this happen with headphones, when you plug them in and the built-in speaker is supposed to go silent but does not.


BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors