Today I took my phone from ThundeROM v1.6.2 with V9 to ThundeROM 1.7 with VC. These are the steps I took:
1) Unrooted and reverted back to stock without any problems:
http://forum.androidcentral.com/lg-...45403-how-unroot-your-phone-return-stock.html
2) Updated to VC using the LG Software Updater without a problem (once I found a Windows computer to use:
http://forum.androidcentral.com/lg-...guide-using-lg-software-updater-ls670zvc.html
3) Rooted without a problem:
http://forum.androidcentral.com/lg-...-guide-rooting-software-version-ls670zvc.html
4) Installed custom recovery without a problem:
http://forum.androidcentral.com/lg-...covery-xionia-clockwork-cwma-v1-2518-4-a.html
5) wiped data/factory, dalvik, cache, and flashed ThundeROM 1.7
6) rebooted in to ThundeROM from recovery
7) rebooted back in to recovery (via Quickboot) and flashed deluxe buildprop
8) rebooted back in to ThundeROM 1.7 from recovery and proceeded to install all of my programs, settings, etc.
At this point everything seemed to be working OK. I verified that all of the baseband and firmware versions were as I expected (all showing VC and ThundeROM 1.7). I was pretty happy with things, but the battery was draining quite a bit faster than normal and my data didn't seem to be as steady as normal (NPR streaming was a bit choppy and market downloads seemed to take longer than normal. I figured this (especially the drained battery) was simply because of significant use in downloading apps and setting the phone back up. So I figured I'd shut down the phone, turn it back on, plug it in, and go to bed.
Well, I powered it down, but when I turned it back on (long power button press), the screen turned on and showed the LG logo, and that's all it did no matter how long I let it sit there. I've read some posts that mention freezing at the LG logo, but usually that happens after a flash or some other sort of rooting or customizing action. After having a running ThundeROM 1.7 on VC, I simply shut down my phone as I did dozens of times on 1.6.2 and now I'm stuck. I pulled the battery and tried again with no luck. I pulled the battery and tried booting in to recovery, but no luck.
Does anyone have any ideas? Sorry for being so verbose, but I wanted to give a complete outline of what I've done.