So here are some details:
my original PCB board has 3 large chips, i will call them U1, U2 and U5:
U1 reads:
SH6601AF
16A638W
CJCMWSFP
G4
U2 reads:
SAMSUNG 122
K4H2816380-LCCC
H2816 YEE019GNC
U5 reads:
M
88i9045-TFJ2
PAN9320.3
117 BOY
NC
Now for the replacement PCB board again U1, U2, U5 chips:
U1 reads:
SH6601AF
16ACLYT
CC1484911
G4
U2 reads:
WINBOND
W9464G6JH-5
1120H
61052040001
U3 reads:
M
88i9045-TFJ2
PAX9990.4
119 BOY
CN
by searching I think ( i maybe wrong ) the cache maybe different... you tell me
I did the resistance test from the power connector the the 18 connectors at the HSA and this is what I found out:
with the original PCB the resistance goes to zero (closed circuit) at connectors 1, 8 and 10, but with power supply ON (correct power supply 5V) plugged in, the voltage does NOT exceed 3 volts at connectors 1 and 10 or any other point, except for connector 8 the voltage goes to 5 volts.
with the replacement PCB the resistance goes to zero at connector 8 only, with the power supply ON the only place the voltage goes over 3 volts is at connector 8 which reads 5 volts.
what's my next step??? I really don't want to go into the heads.... looks scarry, but I am willing to do what you say... i need to recover the data somehow.