Whoa, easy there pal. Why would you presuppose that I don't know how to use a multimeter to check if the driver is faulty? That is precisely what I did, and the driver has failed, as far as I can tell. I'm not getting any continuity across the driver. I checked the socket - good. Checked the cable - good.
However, I made the original post in good faith because I'm not a headphone repair specialist, and I rely on others in the hobby to make helpful suggestions without laying on the condescension. I don't presume to know everything about diagnosing headphone problems, hence my good faith post.
Also, driver pads - non-conductive. Pray tell what the issue is with setting the drivers on the pads?
Furthermore, to the notion that I should contact Hifiman before taking a look myself? Let's see, the headphones are:
A) out of warranty
B) easily assembled and disassembled, so I see no problem with taking them apart
C) Hifiman, known to have bad solder joints so that is easily fixable on my end, without dealing with a lengthy and inconvenient warranty process. It's worth a look