[7" Kindle Fire HD Q&A, Help & Troubleshooting] Levelonedev:
Hi,

about 3 weeks ago I came across a kindle fire hd 7 tablet at the value world thrift store for $8. I purchased it without testing it at all. once I brought it home, I plugged the device in to find that it would not boot past the kindle fire screen (fire is in orange). I attempted booting recovery, download mode, fastboot, bootloader with the buttons before doing any research but nothing happened. After looking around online I found out I could unbrick this device with a cable I would have to purchase off eBay. I purchased the cable and it came a week later.

I charged the device overnight that day when I went to be to ensure the device was 100% charged, so when I attempted the restore I wouldn't run into a low battery issue. after the device was charged up it was back on the kindle fire screen still waiting to be restored. i searched everywhere and came across tons of dead link, but eventually found the restore tool that was called Kindle Fire First Aide . after forever I setup the program properly and that included the drivers ( had to use adb composite), environment variables (path to the tool), Java development kit and running the bat file as admin. once I got that setup I ran the bat file and then I got more errors which all seemed to be dead link problems.

when that happened I decided to attempt a manual restore via fastboot through cmd commands. I didn't know about " -i 0x1949 " at first so I ran into waiting for device errors. after learning that about that from editing the bat file in the first aid kit I was able to complete a system, boot and recovery image flash. after flashing I cleared user data and cache manually also. Then I ran a reboot command and the device screen went flash and would reboot over and over about 15-30 times before coming to a stop and not bootlooping anymore. I found out this from leaving the cable in the tablet after running the reboot script, my windows laptop would make the sound notifying me over a new device being plugged in. when that happened I decided to open the device manager so I could see if it was unknown or anything. it didn't show anything at all. windows prompted me with an unknown device error also on every boot loop reboot. after that occurred I assumed the script was wrong but that wasn't possible because the device did the reboot. so I looked for another restore tool.

I ended up finding another tool called Kindle Fire Hd System restore tool. that tool was a lot more easy to use than first aid tool kit because they put way too many options in the program. making it so the program had to be set up one way and one way only. I tried the system restore tool and it resulted in the same error, the device would reboot with the boot loop when I tried to boot into normal mode and when I didn't and manually powered down and back on. the device would be stuck on the kindle fire screen again for hours until it would die.

at this point I don't know what to do, I have tried to boot into recovery and looked into more options. maybe I didn't try everything I should have but I feel like I cover all the ground properly. I tried to flash twrp and the freedom boot image but those didn't work either. it could be possible that twrp did install and the volume button it damaged so I can't boot because of that.

if anyone has an idea or tip let me know. please and thank you. going through all this trouble was fun, to be honest, but now after investing so much time, i would really like to use the tablet with a custom ROM. if there is a hardware issue or you think there could be another problem preventing it from ever booting again. please let me know! thanks again

first aid restore tool: https://xdaforums.com/showthread.php?p=38409721#post38409721

KFHD Restore tools: https://xdaforums.com/showthread.php?t=1951254

adb fastboot drivers: https://xdaforums.com/showthread.php?p=42407269#post42407269