[Walmart Onn Tablets General] onn.:
Preface

Long time lurker, first time poster. The only thing I've rooted was my S5 back in the day.

TL;DR

Can you ever come back from a hard brick where nothing turns the tablet on (power button, button combos, plugged into power)?

Tablet Specs (Out of Box)

Onn Surf 8 - 100011885 Model

Android 11

Situation

I purchased an Onn. 8 inch tablet and ultimately bricked it in a day already lol. It was running Android 11 (something I thought to check for compatibility before attempting rooting, but didn't because I got too excited). I followed this thread's instructions and was successful up to the section "Unlocking your Bootloader - Step 4". I remember it rebooting and landing in the orange state which I panicked, but things went on to be ok.

The next sequence of events led to the hard bricking of the device. It doesn't turn on at all and is unresponsive to any button presses.

In the "Creating a Rooted Boot Image with Magisk Manager" section, I was able to get Wifi enabled in preparation of the Magisk step. Unfortunately, the Magisk Manager Canary link led to a 404, so I decided to https://xdaforums.com/t/guide-root-onn-8-gen-2-100011885.4248089/ and download that version of Magisk. I admittedly forgot which OTA I grabbed from https://xdaforums.com/t/stock-stock-backups-images-otas.3998227/ although it may have been the one closest to November date since I did remember that when checking the OS update on the tablet, it had a date of (at least last checked for) November.

I used Magisk and selected the "boot.img" and proceeded to run Magisk to patch it. I got a file with out put similar to "magisk_patched-#####_#####" (I don't know if the actual name is relevant or not), and copied it over to my PC. I got all the way up to the reboot portion in which I said a prayer and took a deep breath, and as luck would have it, it would not power on at all.

Perhaps, trying to combine different methods into one did me in, but It remains a brick. It's not anyone's fault but mine of course, but what I'm wondering is, is did I ultimately achieve the dreaded hard brick we never want to face? I'm thinking that I must have flashed the wrong file (in this case, the patched boot.img). It really doesn't help that I tried to:

Unlock bootloader with https://xdaforums.com/t/how-i-rooted-walmart-onn-tablets-no-twrp-needed.4011659/ (successful)

Grab Magisk from https://xdaforums.com/t/guide-root-onn-8-gen-2-100011885.4248089/ to use and then

Grab a random Onn 8" stock image from https://xdaforums.com/t/stock-stock-backups-images-otas.3998227/ and then

Follow step 8 of https://xdaforums.com/t/how-i-rooted-walmart-onn-tablets-no-twrp-needed.4011659/

Closing

This was not a success for me, and I've read https://xdaforums.com/t/solved-stuck-in-fastboot-with-low-battery-use-this-batch-file.1658084/ which seemed interesting to try and get power to the device, but this wouldn't work since I cannot turn the tablet on at all in any way. I've also read about a USB Jig as well as JTAG, but it's more effort than what it's worth most likely. Thing is, I like tinkering with stuff, and though this is seemingly a lost cause, I'm not burnt out yet. If anyone can maybe point out where I might have gone wrong, I'd like to know - even if I can't ever get it to turn back on again.