If your rom is working
Download and install ?flash image gui? here:
http://www.mediafire.com/?bj10jcokraw7dh8
then download xonia recovery :
http://db.tt/ZKiUHnCU
Open flash image gui
Click recovery
Click browse
Go to your sd/ download folder
Find the xonia recovery img you just downloded
Install it
When youre done shut your phone off and boot into recovery by holding home, volume down, and power
You should be in xonia recovery
Find the bootloop fix option (i think its under advanced)
That should fix your bootloop
I would recommend wiping your phone and and doing a factory reset (IN RECOVERY ONLY)
And youll probably wanna go ahead and read this and flash a new rom
http://forums.androidcentral.com/showthread.php?t=108282
[HOW-TO] Simplified Root + Recovery + Custom ROM
Sent from my LG-VM670 using Android Central Forums