Hey Andy,
I'd like to thank sincerley you for your help and I give you an other email of mine
kluber@hotmail.comThe thing is my other account is flood by some others yahoo groups I need to get a rid of that!
I just checked the polarity of the D2, D3, D4 and C21 everything is good I also checked on my DVM the values of the diodes which look fine.
The D2 is a zener diode, a 1N4730A buy on mouser.com from the Jed's parts' list.
I didn't know I need to wait at least 30min before taking any measure. I rechecked the power supply, the battery. Then, I did the reset procedure again. I plugged the 56K connector and for maybe 30 sec the LEDs 1, 4, 6 lit the bank A didn't, and the write and manual LEDs blinked then it turned back to normal except for the blinking LEDs finally they stopped.
So I tried to turn the resistance and sometimes the Manual LED blinked one two three time then stopped.
What do you think?
Cheers!
Vincent