Screen is black & unresponsive after opening
I was curious about the process of replacing the screen of my iPhone, so I took off the screen and started practicing. After taking off the screen, I then went on to disconnect the flat cables that connected to the front panel WITHOUT DISCONNECTING THE BATTERY. I took off the front panel and them connected it again. When I turned on the phone, it had lines on the lcd display and half of the touchscreen didn't work. Then I went back into the phone thinking that maybe I didn't connect the cables correctly. After doing the same thing as I did before, but WITH DISCONNECTING THE BATTERY, I finally turned on the phone again. Now my phone's screen won't turn on, it's not responsive when I plug it into iTunes, and there's no vibration or anything after plugging it into a charger.
Could it be that I broke the logic board and that I need to replace it?
PLEASE HELP ASAP!!!
Is this a good question?