Headphone extension cables 3.5mm

So my left headphone doesnt work since few days ago, i thought it was just the headphone's problem so bought a new one, and dang its still the same. Any sound doesnt come out from the left side of mine. Tried to do some tutor in youtube but almost everyone did the same tutor (the sound control...

Okay so my mobo broke. I'm looking to upgrade but I'm not sire what to upgrade to. I have a z97x. I would also like to make it future proof. So I can get ddr4 ram and an i7 8700k instead of using my current 4790k I was looking at this mobo...