Hey, guys!
I've had my Optimus V rooted forever, and just now decided to get me a new ROM. I followed all the instructions in the OP, as far as I can tell. Managed to get ionto CWM recovery, and tried to flash a new ROM. It appeared to work, although it returned an error message about not being able to access /sd-ext, I believe.
Other than that, the install appeared to be successful, except that upon reboot, I'm stuck in an LG flash screen reboot loop. If I pull the battery, I can then get back into CWM recovery to try again. I've repeated the instructions a few times for several different ROMS, including clean 2.3, and Froyo Optimum, and what I believe was a stock VM rom, all with the same result.
So what should my next step be? It looks like some people are recommending Xionia Clockwork to fix it, and I'll do that if I have to, but I'm on an Ubuntu machine, so I can't do command line through my PC, as far as I know.
update: the Xionia recovery .zip is refusing to install. My phone says it's bad. Balls. Gonna find another one that is ...not bad.
update 2: Got Xionia to install after all. I have no idea why it was bad before but it isn't now. Booted into Xionia Recovery. Went Advanced>Fix Boot Loop, which...immediately put me into a boot loop. Which is not real useful, but on the other hand it's actually kind of hilarious.
Update 3: I wiped and formatted everything from Xionia recovery, as per rom install directions, and installed a stock ROM,
and now the phone is booting directly to the LG logo and staying there. Huh. And if I hold VolDn, Home, and Power to boot, it boots to this:
Android system recovery...
Do not pull out the battery!!
Formatting Data...
Formatting Cache...
Factory reset...
Rebooting...
and then it reboots right to the unending LG logo again, so I can't even get back to the Xionia recovery anymore. Is there any way to break this loop? For the record, it was Xionia Recovery's "LG style factory wipe" that got me here.