Let me get this right.
You bought a pair of used lcd-2 manufactured in 2011?
When you received the headphones, there was something wrong with the left-side driver?
you think the problem is from the cables?
Am I getting this right?
If so, contact the seller that you picked up from.
Get a new cable to test. Maybe a member that is around you can help.
if the driver is still acting up after the cable change, i would try to get a refund because he sold you a faulty set of headphones.