Originally Posted by geekmaster
It sounds like your MfgTool profiles may be messed up, so that MfgTool cannot find the custom u-boot images. Try downloading it again before retrying.
I tried re-downloading it and I was able to get the weird battery symbol to show up! From here I'm going to try the process described in the "My Kindle 4 is Frozen in System Diags" thread. Hopefully I can repair it from here! Thanks!