My Kindle Fire is stuck at the yellow triangle screen after installing TWRP. How can I fix this? I followed the instructions on the official TWRP site on how to install TWRP on the Kindle Fire. So I did

wget &lt;twrp.img&gt;
adb shell idme bootmode 4002
fastboot -i 0x1949 flash recovery &lt;twrp.img&gt;


But now, my Kindle Fire wont boot. It just shows a yellow triangle. How can I fix it?
You need to reset the bootmode. This can be easily done with fastboot. Execute the following commands:

fastboot -i 0×1949 oem idme bootmode 4000
fastboot -i 0×1949 reboot