Audio Issues - Realtek ALC3306 - Lenovo Slim Pro 7 14ARP8 - Type 83AX

[SoulFreeze]

Hi, trying to troubleshoot some problems with this laptop I just finished repairing which had power issues (Burnt Buck converter - SY8883DFC shorted to ground).

After repairing the above issue, I realized the following remaining problem,
Sound only comes from bottom speakers, top palmrest speakers don't work. Neither does the headphone jack (static/buzzing).
The computer recognizes headphones are connected and displays a popup in windows
Sometimes, the computer will boot up and the sound will be working fine. However, if I run intensive programs and the computer heats up, The audio quality starts degrading in the headphones, which calms down after cooling.
Whatever the issue is, it's intermittent, and sometimes triggered by thermals, going on somewhere. I suspect maybe a faulty capacitor? Maybe even the Realtek Chip. However, the bottom speakers work fine all the time so I'm suspecting caps may be fine. tried checking for issues around the Realtek chip but seems fine.
I suspect maybe there is a cap somewhere, or a dirty power rail. Does anyone have any insight on this?

Couldn't find any datasheets for the ALC3306
If anyone has a schematic for the laptop, or any other schematic utilizing the Realtek ALC3306 it might help with pinpointing the issue,

[SoulFreeze]

I found a schematic from a Lenovo Legion 5 (15ACH6A) that has the same codec chip.
I have some questions. In the legion 5 there are 2 amps, driven by the ALC3306. In my laptop im assuming its just one amp, driving the bass speakers, from measuring with a multimeter, seems the high freq speakers are attached directly to the chip, so are the headphones.
My question is, in this legion 5 diagram, it says CODEC ONLY on the outputs for both speakers, what does this mean, is this a digital signal? it looks like those signals (CODEC_I2S_**) go directly to the CS35L51 AMP.

Does the ALC3066 have an ability to switch between analogue and digital from the output pins?
If thats the case then my hypothesis is

A. The chip is just not switching to analogue output, resulting in the whitenoise/buzzing from the earphones
or
B. The ALC3306 Analogue section is causing the issues, either through bad AVDD power rail. or just he chip having a faulty analogue section.

Since the fault is intermittent and audio degradation occurs from heat in the rare occasion that it does work makes me lean more towards B.
Also the fact that the audio is perfectly fine from the internal speakers connected via the amp, but not the ones wired directly to the chip + headphones, points to the idea that the chip has no problem delivering a digital signal to the amp. but only when switching to its internal analogue amp does it have issues.
All this rests on my hypothesis that the alc3306 has both analogue and digital output capability which can be interchanged on the same pins, and that there is an internal amplifer powered from the AVDD power rail.

I am not very experienced with how these codecs work so kindly correct me if im wrong and looking forward to anyones ideas.