sub board flex cable scratch does it stop the phone to stop working?

I scratch my sub board trying to replace the lcd screen and digitize when removed the battery it cost fire for bout 2 seconds. i replace the battery. i notices my sub board look like it was scratch deeply. my power button look ok but i can't get it to turn on. the logo screen come on and showing the battery charging. could it be that i damages the sub board flex cable? please can someone help me i really love my alcatel one touch idol 3 thanks so much.

Rainbow girl 19