Following is the method to tell you how to enter into LG Optimus 3D’s Emergency Mode, this mode will help you to connect your LG Optimus 3D to your PC and use flashing tools (e.g. LG Mobile update) to restore or change your firmware. I am pretty sure it can get your phone working again if it is bricked. Good luck. LG Phone Problem and Solution
How to boot into LG Optimus 3D’s Emergency Mode Steps: LG Android Phones
If this is the first time the driver install redone the item 5).
Caution: Remember to backup your files before flashing. This will erase all of your personal data. LG-Optimus info
LG Optimus 3D Phone Photos – LG Cell Phone Pictures
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why does it always stop disconnect during the update phase?