I am so technologically inept

i bought my SE w810i off of EBAY unlocked (LALA West) and it worked terrifically! but awhile ago I had accidently locked myself out of my dorm room for a few days and my phone was dead for a few days. I had my alternate battery charging on the desktop charger for all of those days. When I eventually got back into my room, I but the fully charged battery in my phone and instead of the phone turning on, it just flashes ths white screen....over and over again. Now people are talking about firmware and flashing my phone and whatnot and I have no idea what anyone is talking about.

A little help?

I thought you dropped out of college. Lying *****

Anyways, google is your friend

http://www.seuniverse.com/step1_k800_help.php

I did drop out of college this happened a long time ago and I have been using my old cellphone

Thanks for the link. I don't like google

Not sure if you're phone is still flashing white screens (WSOD) as you didn't provide an update.
But you will need to flash your phone using either Davinci Team (http://www1.davinciteam.com/index) or Wotan Server (http://www.wotanserver.com/en/)
heres a lengthy thread to get your started http://howardforums.com/showthread.php?t=980783

ive flashed my phone before, but since your phone is SE, its not going to be easy...
advise you to return the phone or take advantage of the warranty...

next time, buy motorola...
cause if you have a firmware problem, you can reflash the phone your self...