[Pan ĐT] DCT4 Flash OK but Not power ON

NOKIA DCT4(1200,1208,1650 Etc........)FLASHING COMPLETED AND WITH CABLE SHOW LOCAL MODE
BUT WITH BATTERY PHONE NOT POWER ON

THIS MY TECHNICIS
MAINYLY THIS CAUSE BSI RELATED PROBLEM
BUT 1650 IS DIFFERNT CAUSE
60%SOFTWARE PROBLEM 1650
SOLUTION
1)ERASE FLASH
2)FLASH LAST VERSION(MCU+PPM+CNT)
3)WRITE PM
4)UNLOCK&FULL FACTORY

HARDWARE SOLUTION
1)CHANGE BATTERY

2)RESOLDRING BATTERY CONNECTOR

3)CLEAN OR CHANGE BOTTON CONNECTOR

4)CHECK BSI WAYS

5)CHANGE BSI RESISTER

IF PROBLEM NOT SOLVED?
REFLOW OR CHANGE UEM
UEM CHANCE 40%


SAME PROBLEM FACED DCT4 ANOTHER MODEL HANDSET