[BOUNTY] Note 4 N910W8 Audio distortion problem

Hello everyone, this is my first post here and before I ask my question I have to say thanks to all XDA members for the great help you provided me over the years.

Today my problem is that the sound/music in my Note 4 (TRLTECAN) through the 3.5mm jack plug is really really distorted and by distorted I mean crackling, noisy, not ''listenable''.... Also only the left channel is working.
I already did a lot of search and here is what I did so far :

• Tried 3 audio output devices (AKG Q701, Stock earbuds, Harman Kardon SoundstickIII)


• Flashed stock firmware from SamMobile with heimdall


• Tried Viper4Android on SlimRemix LP 5.1.1


• Replaced the jack plug with an OEM brand new one


• I carefully cleaned the contacts between the logic board and the replacement jack plug connector

I tested different audio output like bluetooth and usb via the Samsung Multimedia Dock and through my Fiio E17 DAC and all was crystal clear. So now I'm asking you guys if you have ideas... Oh by the way my Knox counter is tripped so no RMA or repair for me... If someone can find a solution for this I'll give money to this/those persons and be extremely grateful !

Thanks in advance !

P.S. I usually write in french so sorry for the bad english.