Right Ear Issue After Main Wire Replacement

Recently my Beats Solo 2 Wired stopped working in the right ear with no audio playing. Sometimes it would work if you shook the device but after taking it apart and doing a full wire replacement the issue persists.

I’m reading online this could mean its a full speaker failure but I am afraid of investing another $15 after buying a $7 and $15 ear muff replacement. All this totaling near the $55 it would have took to send it in to a shop.

Does anyone know of how to properly diagnose if this indeed is a speaker problem or could be something larger.