[General Questions and Answers] Wheeld03:
Need help fixing bootloop via PC (ADB=Yes, Fastboot=NO)

Hello,

Not sure what forum to take my question to as it is not a flagship device or anything...

Spent many an hour researching my problem but can't get a plan together on how to fix my bootlooping tablet. I'm not a total n00b when it comes to this stuff, but it may sound like it as I describe my situation. I'm familiar with the terms and general function they serve i.e. images, bootloader, adb, fastboot, ROM, flash, sideload, buttons to press to get into recovery etc. I'm just not savvy enough to take all the pieces of info I've collected and compile that into a procedure to follow. If that makes sense.

Short story:

I have a rooted tablet w/ custom rom in bootloop after messing with system files via Titanium Pro. No backups (the shame is real). On my PC, adb device command is recognizing the device, but nothing with fastboot. stock recovery on device can be accessed via physical button presses. there is no custom recovery. I don't have the stock Insignia build, but do have all the custom rom files.

Full Story:

I have an Insignia Flex Elite 8" tablet. Months back, I successfully rooted it with Kingo Root on PC and flashed the only rom I ever came across for this not very popular device and even less popular model. The rom I flashed was OMA. This was a SU rooting, not Magisk. I was happy to get this far and now looked forward to stripping the tablet down to focus performance to run games better. I didn't have but one kernel choice - the one that OMA loaded, but with root, I figured I could at least streamline/push it with Kernel Adiutor. Games got better, but I continued to look for more tweaks to up performance. I was running Greenify, kernel overclocking, RAM expanding and swapping, and froze nonessential apps with Titanium Pro... (this is where obsession teaches me a lesson) In my need for speed I turned to system apps :rolleyes:. Bad idea you say? Yep. I researched general android system apps that coud be frozen of deleted with Titanium Pro and instead of making a backup or nandroid, just ticked a couple of those in the app and rebooted... :eek: This gave me the OMA "thunderstorm" boot screen in eternal loop.

What I can tell ya:

I was able to use physical buttons to enter stock recovery and did a wipe and factory reset, but no help.

I can access my tablet via PC ADB (it shows the ID with adb devices command), but can NOT fastboot. It sees nothing. I read somewhere the rockchip 3288 does not support fastboot? I have used adb and fastboot from same folder on other devices, so I'm going with I can't use fastboot method :(

I couldn't find anything online about (and this is just some stabs at ideas here) using ADB sideload or update from ADB to fix the loop. First, I'm not even certain if the fix is as easy as flashing a single file were I able to use fastboot, but I looked for ways I could do the same via sideload and never felt confident in findings.

Even with this soft brick, Kingo Root on PC recognized my tablet in bootloader and so I ran a successful root on it. That must mean the USB debugging is still present so maybe someone can help me fix the loop based on this info.

Thanks!!!!