arnonabuurs
New member
Hi guys, happy new year! I have a 820-3476 with no backlight (can see the apple logo with flashlight). The board seems not to have liquid damage looks very clean also the area round U7700 and LCD Connector. I get 12.61v on pin 9/10. I did notice I have no voltage on the backlight Enable pin 17, what should this be? R7742 = 0 ohm. Any suggestions?
EDIT: Some extra messure i did:
C7717 pin 1 = 5.17v
Q7700 pin 3 = 12.51v
Q7700 pin 4 = 12.61v
Q7700 Pin 1/2/3/4 = 0v
R7701 = 80.3k ohm
R7702 = 63.5k ohm
So i figure the enable signal is not working for the backlight, please correct me if im wrong in my assumption
EDIT: Some extra messure i did:
C7717 pin 1 = 5.17v
Q7700 pin 3 = 12.51v
Q7700 pin 4 = 12.61v
Q7700 Pin 1/2/3/4 = 0v
R7701 = 80.3k ohm
R7702 = 63.5k ohm
So i figure the enable signal is not working for the backlight, please correct me if im wrong in my assumption
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