I just wanted to register to say a huge thanks to Phikappa, Katzurki and all. I paid to to have my screen replaced and was happy however the other night I ran it out of battery for the first time and got the problems described. I used that WBF file and flashed it and my Kindle is good as new.
Something I feel was left off of the guide was that you need to disable the Enable Diags, otherwise it will just boot into the Diags everytime. From the main menu after you have updated the waveform hit 'D' and then 'X'. Easy to work out but I overlooked it first time round.
