[G2 Q&A, Help & Troubleshooting] Palingenesis:
This is a copy+paste from a reply I wrote in the Q&A section of the CloudyG2 3.1 rom.

"Alright, so since yesterday, I have been trying to find out how to install this rom in the correct way. I asked in the original thread of the rom (before I knew there was a Q&A). I was on CloudyG2 2.2. I am using LS980 Spring Variant. My question was, do I need to TOT back to ZVE and update to ZVG and root and install CloudyG2 3.1 that way, or could I just stay on 2.2 and go into recovery, wipe data and everything, then flash the LP bootstack and install the rom and hotfix. One person replied, "Yes". I asked to what was he referring, tot or just wipe everything from 2.2 and flash it. Then somebody else said to tot. So today when I got home, I decided to tot to zve.

After I got to ZVE, I updated to ZVG, successfully. I rooted, AutoRec. All was well. Then I went into recovery, wiped data, system, cache, dalvik. Then I flashed CloudyG2 3.1, flashed dorimanx 2.9, then flashed the LS980 hotfix. I rebooted my phone and it stayed on the LG Logo for about 5 minutes without anything happening, no boot animation, so I assumed something went wrong. I reboot into recovery and wiped everything again and flashed the LP bootstack (I read somewhere in the oringal post that people were saying to do this.) after that, I flashed the 3.1 rom, then flashed dorimanx, then flashed the hotfix, then rebooted. Immediately after I rebooted, it flashed the LG logo then went straight to a black screen, like many others are getting. So I assumed it had to do with having the LP bootstack. I also read that needed to be on Kitkat modem. So the change I made this time was I rebooted into recovery, wiped all, then flashed the kitkat modem this time and not the bootstack, then flashed the 3.1, hotfix and rebooted. Same thign happened again, showed the LG logo for a second, then went to a black screen.

At this point, I am not sure what is going on. So I decided to try to tot to zve again. Only, when I go into download mode, I get security error. I am still able to go into recovery, however, that is all I can do. I know people keep saying read the OP, and I, like many others have read the OP and perhaps do not clearly understand it. And I have tried to ask around, but it seems people are getting bashed for not understanding the OP or how exactly to flash this rom.

Could one of you kind people please give detailed instructions on how to go about getting this rom to boot on the LS980 variant?

And could somebody help me with my specific issue, not being able to get into download mode now and not being able to boot up a rom. Like I said, I can still get into recovery and flash things. But all I have tried, I mentioned earlier in this post, none of it works, any suggestions?

So, I came across this thread, which seems to be a fix for my phone. (Unless someone here knows an easier way?) http://xdaforums.com/show....php?t=2582142

"You must use the img files that correspond to the ROM you have installed before getting the problem to avoid breaking your phone. The link above is for 10b_EUR_16G firmware version. So don't use those files if your firmware version was not that one. Instead you should look for img files corresponding to the current version installed in your phone. If you don't know what version you've installed then don't use this method because you will break your phone. "

It says I must use the img files for the rom I have installed before getting the problem. Could somebody elaborate please? I had stock ZVG, then flashed cloudyg2 3.1, that is when my phone messed up. Then I tried ultrapop (stock ls980 LP rom)."