This won't work if your using any kind of Clockwork Recovery.
I found out the hard way.
Played around for 2 days until I found out that Clockwork flashed my phone to a different model. (VS840)
If you unbrick the phone and go on the LG support update, if will check the model of your phone and flash it by the model number that it reads.
See our phones should be an LS840 but mine was changed when I wiped the data.
The Clockwork version I tried to used was for the LG Connect 4G (5.8.3.1)
this recovery worked great until you tried to flash a kernel or restore an img.
So phone is dead. Ordering a new one off ebay.
Ok now for the fun part if you want.
Uunbrick you ask, well yes there is away to get you at least back to the LG update if you want to try and.
See as stated I was at the LG logo screen and couldn't do nothing. well here it goes.
All this does is get you back to LG update.
(plug in usb cable & hold the volume up key while turning on the phone)
First step if you can get into CWM you will need to do a small update. go here:
(ClockworkMod looping after flashing. Download this and flash in recovery
Change the file to update and run it then reboot your phone holding down the keys stated above.
This will get you back to the LG update. Good Luck!
However like I said beware of the model number!