BLACKBERRY 9800 NOT BOOTING/REDLIGHT BLINKING

THIS IS THE COMMON PROBLEM IN 9800 PHONE AND THE VERY COMMON IS RIPPED OFF THE RIBBON OR LIQUID DAMAGE,CHANGE THE MAIN FLEX WITH NEW ONE OR WHOLE SLIDE ASEMBLY This phone has smart indicator(red light) It blinks only when---''SOMETHING WRONG OR OPEN CIRCUIT OR SHORT CIRCUIT'' OPEN CIRCUIT-Ribbon crack,light sensor damage etc SHORT CIRCUIT-Liquid damage on trackpad socket-lcd connector-red light itself or light sensor etc THANK YOU