use the lgnpst method of unbricking from lg screen. heads up.. you will most likely have to reprogram the MEID and ESN and flash a prl to get it up and going
if you need help with this you can PM me.. it will pop on my phone.. if you are on Win7 you can request assistance and give me the code and i can do most of it for you. my days are full of nothing but staring at java code these days.. so something to break the monotony will be welcome.
also.. what version of android is your phone? if you used gingerbreak or z4root to root it, you can use it to unroot it. this will leave any custom recovery you have installed intact.. if you want to restore your phone to 100% stock you have a couple options. you can follow the advice above.. or i have an untested stock recovery image. that along with a stock nandroid backup that you may or may not have, will effectively restore your phone to stock, you will still have to use z4root or gingerbreak to unroot your phone. anyway.. hit me up.. ill give ya a hand