Semi bricked! ZE600KL (Z00L), Error 7 on any attempt to install any rom.

[Downgrader1995]

Hi
I had a PIE rom installed on my ZE600KL with the latest audio patch (all pie roms don't have audio on ZE600KL and ZE601KL unless you install a patch)
I didn't get a good experience with roms so I decided to install an old rom :
https://forum.xda-developers.com/zenfone-2-laser/development/rom-smoothified-stock-rom-t3404050
which is based on marshmallow, which wroked but it had no audio either!

I then decided to follow this guide :
https://forum.xda-developers.com/ze...50kl-ze551kl-zd551kl-ze600kl-ze601kl-t3333482

to go back to stock rom, which was successful, however, I still have no Audio (I used the official firmware available on the ASUS website, named UL-Z00L-WW-21.40.1220.2171-user).

so I decided to re-install TWRP (because the last step made made TWRP malfunction, can't touch anything in TWRP, it didn't re-install the stock recovery), and then I tried to install any rom, and no matter which rom I try, I get TWRP ERROR 7

I decided to edit the rom files to remove the 3 assert lines to bypass the check, but no luck!

so I'm now stuck on the stock rom, with no Audio, but everything else works!.

I tried installing older versions of TWRP but all had the same error 7

I then decided to look up similar issues and I found that cyanogenmod 6 had a workaround zip patch for audio not working on this model (ZE600KL) and I flashed that, still, no audio.

any help would be appreciated!.

 

[Downgrader1995]

partially fixed by installing FireKernel-r3.2-22-10-2019-07-54-Z00L
now I can install roms,still no audio regardless of used speaker patch

 

[Downgrader1995]

I've tried everything now
7.1 roms, 8.1 roms, pie roms, every sound fix available, wiping everything, installing fire kernel, installing Icey kernel
no audio what so ever

device : Z00MD or ZE600KL (Z00L)
reason : wanted to go back to stock rom from android 9 Pie while having flashed the audio fix kernel, but flashed the smothified rom, then it had no audio so I used LUK's method to go back to stock firmware (which did not revert me to the stock recovery)
then it had no audio

everything other than the speaker works

- Audio through the headphone jack works
- Audio through bluetooth works