I have a kindle DH8 7th gen, which I use only once per year to help me fire a fireworks display. When I came to use it this year and charged it, it now hangs at the yellow Fire logo.
I'm new to any kind of android hacking, but I thought "how hard can it be to unbrick?". Well now I'm finding out!
I didn't enable USB Debugging in the fire when it was running OK. Boy do I regret that now.
Anyways, everything I've tried "soft-wise" to unbrick it has failed and it seems that is down to the fact that I can't flash anything to it as the bootloader is locked (not sure I'm using the right terminology, but be kind to me, I'm a newbie). I tried adb and fastboot via USB. ADB doesn't see the device. Fastboot will see it when the kindle is in fastboot mode, but I can't flash (or do anything) without being confronted with the message that it can't be done on a locked bootloader.
So I resorted to taking the back off and trying the bootrom-step.sh and shorting TP28 to ground.
But I'm getting nowhere with that either. I get "Waiting for bootrom", but no amount of attempts to short to ground and inserting the USB into my W10 laptop running an Ubunto app, gets me any further.
What am I doing wrong?