I upgraded my phone to ICS and after experienced some battery draining problems. So to combat that, being a stupid newbie myself, I went onto Google and downloaded some programs to reverse it to an earliar firmware. Unfortunately it didn't work and so now its run into this problem and I don't know how to fix it. Its hard to describe so I have put a youtube link to show whats happening:  Also, when I plugged in my phone into a plug charger, the LED notification turns white and allows me to go to fast boot. HOWEVER, when I plug it into a USB computer, theres the white LED notification however when I press the power key + volume buttons, it doesn't do anything except turn off the white LED. Once I let go, it turns back on the white led. I am super frustrated. Any help would be greatly apprecaited.