HOW REPAIR DEAD MOBILE PHONE

WHEN YOU RECIEVED DEAD MOBILE PHONE FROM ANY CUSTMOR
FIRST OF ALL YOU CHEK OK CONDITION OF CELL PHONE, AND ALSO CHEK FOR ,SHORT CONDITION ,OPEN CONDITION, AND LEAKAGE CONDITION OF ANY PCB OF MOBILE PHONE .IF ALL CONDITION IS OK .THEN CHEK LEAF OF CELL FONE,IF BROKEN THEN CHANE ,,THERE ARE TWO TYPE OF FAULT IN CELLS
1)-SOFWARE -FULL FLASH  YOUR MOBILE PHONE..........IF NOT SOLVE THEN CHEKE
2)-HARDWARE--CHEK BATTERY CONECTOR,,BATTERY ,,CHANGE RTC. CHANGR OCSILATOR CRISTAL ,, POWER IC .AND FINALY CPU,,ALSO CHEK FOR OPEN TRACK OF PCB.FLASH IC MAY BE FAULTY,,ALSO CHEK THEM