possibble ways to fix the audio dac in my phone?

so, a really long time ago, i was testing an amp wich runned of 12v 2 amp, so i hooked up my phone to it, buuuuuttt.. i "may" have slipped and electrocuted my left audio channel in my phone.. but im not feeling like spending a ton on professional repair/ a new motherboard, so i wanted to ask, what chip would possibly have been blown up? so i can find a replacement for that 1 chip/ resistor (possibly) because i do know the left channel does work reaaaly faintly any help on it? i do have experience in soldering reaaaaallly tiny stuff (pretty much microsoldering) but not that much experience in circuitry..