At this moment I have root but my bootloader is locked, so no TWRP recovery.hello,
perhaps you can try this: https://forum.xda-developers.com/android/software-hacking/mod-increase-frames-5-14-15-t3108786
By default the charger only outups the 5V. If it detects by software that the device is compatible with quick charging, than it changes the voltage profile.Just wonder can I use my quick charge 3 charger to charge this tablet ? In other words does more voltage than 5v will burn this tablet ?
Do you have a backup of your recovery.img? If so, I can start work on porting TWRP. Desperately need it. (Riru, soft-brick.) Also, you could have used Magisk to patch your current boot.img and copied to sdcard, then flashed that instead.When I got my T1P4 it rebooted a few seconds after turning off the screen. Eventually got $25 rebate for it.
Then I flashed a magisk patched T1P2 boot.img and installed busybox, and now it works 100% without rebooting.
Settings:System->Advanced:About tablet:Device info:Cpu type