My V was so bricked my computer didn't even recognize it in emergency mode.
Tried all the unbrick guides here, but they all error'd out at some point or another.
Ended up going here:
Unbricking Your Optimus V - Android Forums at AndroidCentral.com
It did zero out my MEID, MSL, ESN, and AAA code. Got everything back with the help of this video and a few other guides mentioned in the thread. All that is except the AAA code=(no data).
It was a stone cold brick and now it's at the very least everything but 3G. Would I still have used this guide now, knowing what I know: Absolutly.
This ^ is only to be used if nothing else works, as you will loose data.
When I was done it left me on the Stock ROM with ZV9 update.
Rooted with EManUL3XXX's root guide, then installed the same recovery I had on the other 2 V's. Then I restored a ZV4 backup I had made with one of the other 2 V's. So now I'm rooted and have the ZV9 SW version, but, I'm on a ZV4 stock ROM.
Then I went about fixing my PRL and MEID, ESN, etc.