checking the transform T601 onboard (not connecting to power), I could see that terminal 1,2,3,4,5 are all shortcut between each other. (making "beep" on the multimeter).
(is that normal or mean the transform is bad?)
checking T601 output voltage and "playing" the start button, I could see changes when green light off/on (not connected to VGA source):
terminal1=0.2 /0.7
terminal 2=0 /0
terminal 3=0 /0
terminal 4=3.0 /6.7
terminal 5=2.5 /5.6
(*I'm not sure if the unit are volts... as the multimeter is set on " ACV , 200")
checking the Transform Output (TO)(assuming it's AC) related to BLT_ON voltage (DC) wile connecting/disconnecting VGA source:
* checked the TO on the D702 terminal
1) NOT connected :TO=0.2 ,BLT_ON=0.0V
2) connected: TO=0.4. BLT_ON=0.0v
3) disconnecting:
TO: first no change (0.4) then raise to 0.8 and go down to 0.2 (when the green light shut down)
BLT_ON: first no change (0.0v) then raise to 3.3v and finely drop back to )0.0v (wile the green light shut down)
( in last case, when the BLT_ON raise to 3.3v' the backlight turn on shortly )