[buzzkill]

Hello friends, I have been using a pair of Sennheiser HD 555's for around 2 years and tonight the right side headphone stopped working. I opened it up and was playing around with all the wires...I got it working, put back on all the casing, but it turned off when I put it on my head. Took everything apart again and can not get it to work anymore. I was going to buy the replacement cable but it would be a waste if the driver itself was broken. Is there any way to tell if its the cable or the driver that need replacing? Thanks for the help.

 

[Uncle Erik]

Yes.  Do you have a DMM?  Use it to check for continuity.  You can find them for $5 at Harbor Freight.
 
Most likely, you have a bad solder joint inside the cup.  Touch it up with a soldering iron and it'll be like new.