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PW2 Unbricking w/ USB and Serial

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Hello, I have been trying to unbrick a PW2 (S/N starts with 90D4). I was given this already bricked. I have cracked it open and attached wires to the serial pads and an adapter all set up and I am able to see everything happening in serial via picocom on a Linux desktop and I can send keystrokes and all. I was following this guide and using this fastboot.
Following the guide, everything is going good; I interrupt boot process and get into uboot. Then I run
Code:

bist fastboot
. Using the aforementioned fastboot, I run
Code:

./fastboot setvar bootmode diags
and it seems to work, the output is
Code:

setting 'bootmode' to 'diags'...
bootmode diags:
finished. total time: 0.175s

then I
Code:

./fastboot reboot
The serial output during boot is here. I'm not sure why it doesn't boot into diags. However, using the python trick I can log in to root. Touchscreen is not responsive. Also, please direct me to any better resources for PW2 unbrick since the attached github guide seems 'unpolished'.
:thanks:
P.S. I want to ultimately do as much mod as possible to make the user experience better. So, I guess I will do jailbreak. Please LMK if this is the best course of action.

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