Hello fellow serbian
PW5 doesn't have serial port connection pads (at lest not on
production version of motherboard, pre-production version send to FCC had it next to that orange square heatpad on the last photo
seen here). It uses a special USB-C cable for serial / UART / TTL.
And even that cable would be useless to your planned debricking since the UART input
is locked until you unlock the bootloader (which you can't do
).
Read this for more details:
https://kb.taktpraha.cz/projects/kindlepw5
So in short: unless you manage to find someone with equipment and know-how to remove the eMMC chip > program / write directly to eMMC > "reball" / re-attach the eMMC back to the motherboard you're not gonna "debrick" that Kindle model.
I had 2 PW5 brick themselves / get stuck in a bootloop after normal OS reboot and never managed to find someone willing to fix it by writing directly to the eMMC chip.
