Hi,
by being a dumbass I got two T3As with the 245 handle. (Un)luckily I got one that is buzzing with the PWM one isn't. Both of them working V1.3 models and produced on the same day (2023.08.11 for the record) per the QC-passed card.
![Phew :phew:](https://www.eevblog.com/forum/Smileys/default/phew.gif)
So I can conclude that it's not an issue of the hardware revision, since there were reports from before the V1.3 was available.
I already checked out that it's not the plug, as applying some force on it, does not fix the issue or the sound of it, which i would expect if it's just a bad connector. But the sound is definitely coming from the front.
Sadly I don't have the tools to remove the front panel. If somebody (maybe @c0d3z3r0?) wants to investigate further, I would be willing to loan the noisy unit out (and would also pay for shipping of course).
Best,
canetoad